You searched for subject:(Biomechanics).
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University of Georgia
1.
Baker, Katherine McDowell.
Biomechanical analysis of abnormal canine and avian stifles.
Degree: MS, Biological Engineering, 2013, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/baker_katherine_m_201305_ms 
► By continuously measuring the kinematics of the stifle in all six degrees of freedom, the effects of various treatments may be quantitatively investigated. The Oxford…
(more)
▼ By continuously measuring the kinematics of the stifle in all six degrees of freedom, the effects of various treatments may be quantitatively investigated. The Oxford knee rig provides a validated method of simulating deep flexion of the stifle in vitro while retaining its full range of motion and minimizing variability between animals. The studies herein used a modified Oxford knee rig and a three-dimensional motion capture system to investigate (i) the effects of tibial plateau angle and spacer thickness on canine total knee replacement and (ii) the variability of stifle kinematics among broiler chicken breeds with varying susceptibilities to leg deformities. Strain to the collateral ligaments in the canine and the gastrocnemius tendon in the broiler were also investigated. Results from both studies showed measurable changes in stifle kinematics, and results may be used to improve the welfare of canines with stifle osteoarthritis and chickens bred for rapid growth rate.
Advisors/Committee Members: Tim Foutz.
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Baker, K. M. (2013). Biomechanical analysis of abnormal canine and avian stifles. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/baker_katherine_m_201305_ms
Chicago Manual of Style (16th Edition):
Baker, Katherine McDowell. “Biomechanical analysis of abnormal canine and avian stifles.” 2013. Masters Thesis, University of Georgia. Accessed December 18, 2018.
http://purl.galileo.usg.edu/uga_etd/baker_katherine_m_201305_ms.
MLA Handbook (7th Edition):
Baker, Katherine McDowell. “Biomechanical analysis of abnormal canine and avian stifles.” 2013. Web. 18 Dec 2018.
Vancouver:
Baker KM. Biomechanical analysis of abnormal canine and avian stifles. [Internet] [Masters thesis]. University of Georgia; 2013. [cited 2018 Dec 18].
Available from: http://purl.galileo.usg.edu/uga_etd/baker_katherine_m_201305_ms.
Council of Science Editors:
Baker KM. Biomechanical analysis of abnormal canine and avian stifles. [Masters Thesis]. University of Georgia; 2013. Available from: http://purl.galileo.usg.edu/uga_etd/baker_katherine_m_201305_ms
2.
Diesbourg, Tara.
Cervical flexion relaxation phenomenon and the modulating
effect of trunk flexion angle.
Degree: MA, Kinesiology, 2011, National Library of Canada
URL: http://scholar.uwindsor.ca/etd/163
► The purpose of this study was to assess the presence of the flexion relaxation phenomenon (FRP) in cervical paraspinal musculature in an upright standing posture,…
(more)
▼ The purpose of this study was to assess the
presence of the flexion relaxation phenomenon (FRP) in cervical
paraspinal musculature in an upright standing posture, and to
examine the modulating effect of non-neutral trunk postures on
cervical FRP (cFRP). Cervical spinal angles and muscle activation
patterns were monitored in 17 participants while performing a neck
flexion task in six postures. EMG and angle traces from the flexion
trials were used to determine the presence and magnitude of the
cFRP (Extension Relaxation Ratio: ERR) and the cervical angles
associated with cFRP (onset and cessation angles). The cFRP was
observed in the cervical paraspinal muscles (CPS) muscles
unilaterally in 11 participants (64.7 %), and bilaterally in 8
participants (47.1 %), across all postures and conditions. Onset
angle was lower and ERR was higher in the 45░ trunk inclination
condition compared to the upright and slumped conditions. ERRs and
onset angles were not significantly different in the slumped
condition compared to the upright condition. The data from this
study contributed to the knowledge base for the under-researched
area of cFRP.
Advisors/Committee Members: Azar, Nadia (Kinesiology).
Subjects/Keywords: Biomechanics.
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APA (6th Edition):
Diesbourg, T. (2011). Cervical flexion relaxation phenomenon and the modulating
effect of trunk flexion angle. (Masters Thesis). National Library of Canada. Retrieved from http://scholar.uwindsor.ca/etd/163
Chicago Manual of Style (16th Edition):
Diesbourg, Tara. “Cervical flexion relaxation phenomenon and the modulating
effect of trunk flexion angle.” 2011. Masters Thesis, National Library of Canada. Accessed December 18, 2018.
http://scholar.uwindsor.ca/etd/163.
MLA Handbook (7th Edition):
Diesbourg, Tara. “Cervical flexion relaxation phenomenon and the modulating
effect of trunk flexion angle.” 2011. Web. 18 Dec 2018.
Vancouver:
Diesbourg T. Cervical flexion relaxation phenomenon and the modulating
effect of trunk flexion angle. [Internet] [Masters thesis]. National Library of Canada; 2011. [cited 2018 Dec 18].
Available from: http://scholar.uwindsor.ca/etd/163.
Council of Science Editors:
Diesbourg T. Cervical flexion relaxation phenomenon and the modulating
effect of trunk flexion angle. [Masters Thesis]. National Library of Canada; 2011. Available from: http://scholar.uwindsor.ca/etd/163
University of Georgia
3.
Howie, Rebecca Nicole.
Biomechanical analysis of the effects of a total knee replacement on a canine stifle.
Degree: MS, Biological Engineering, 2011, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/howie_rebecca_n_201108_ms
► Several surgical procedures are used to repair CCL injuries successfully, but some animals have osteoarthritis that progresses despite surgery and these joints become painful and…
(more)
▼ Several surgical procedures are used to repair CCL injuries successfully, but some animals have osteoarthritis that progresses despite surgery and these joints become painful and are dysfunctional. In this particular subset of cases, where all medical and surgical treatments have failed, TKR is used to restore the comfort and function of the stifle, but implant failure has been reported clinically. The studies herein used canine hemi-pelves hindlimbs collected from mixed breed dogs to test the three-dimensional kinematics of the stifle before and after TKR and soft tissue removal. This experimental procedure utilized an OKR apparatus that applied a dynamic force to each stifle, tested in 90 to 180 degrees of flexion, while preserving the natural coxofemoral and hock joints. The objective was to identify the specific positional changes of anatomical components within the stifle joint that could cause abnormal ranges of motion in canines leading to TKR implant failure.
Advisors/Committee Members: Tim Foutz.
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Howie, R. N. (2011). Biomechanical analysis of the effects of a total knee replacement on a canine stifle. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/howie_rebecca_n_201108_ms
Chicago Manual of Style (16th Edition):
Howie, Rebecca Nicole. “Biomechanical analysis of the effects of a total knee replacement on a canine stifle.” 2011. Masters Thesis, University of Georgia. Accessed December 18, 2018.
http://purl.galileo.usg.edu/uga_etd/howie_rebecca_n_201108_ms.
MLA Handbook (7th Edition):
Howie, Rebecca Nicole. “Biomechanical analysis of the effects of a total knee replacement on a canine stifle.” 2011. Web. 18 Dec 2018.
Vancouver:
Howie RN. Biomechanical analysis of the effects of a total knee replacement on a canine stifle. [Internet] [Masters thesis]. University of Georgia; 2011. [cited 2018 Dec 18].
Available from: http://purl.galileo.usg.edu/uga_etd/howie_rebecca_n_201108_ms.
Council of Science Editors:
Howie RN. Biomechanical analysis of the effects of a total knee replacement on a canine stifle. [Masters Thesis]. University of Georgia; 2011. Available from: http://purl.galileo.usg.edu/uga_etd/howie_rebecca_n_201108_ms
University of Georgia
4.
Rogers, Andrew Caleb.
Biomechanical analysis of canine stifle motion using custom in vitro
simulator.
Degree: MS, Engineering, 2014, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/rogers_andrew_c_201408_ms
► Motion of the canine stifle joint is not as well understood as that of the human knee. This can be attributed to the limited amount…
(more)
▼ Motion of the canine stifle joint is not as well understood as that of the human knee. This can be attributed to the limited amount of data available on the joint motion and the uncertainty associated with current in vitro gait cycle simulators. Current simulators typically require numerous assumptions and modifications to the canine specimen, which could adversely affect the motion at the stifle joint. The study herein utilizes a newly proposed simulator that replicates the in vivo positional data of the fifth metatarsal phalangeal of the canine paw to investigate motion of the stifle. Results showed similarities and differences to previously published in vitro and in vivo studies, as well as, provided a proof of concept for this specific type of simulator.
Advisors/Committee Members: Tim Foutz.
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Rogers, A. C. (2014). Biomechanical analysis of canine stifle motion using custom in vitro
simulator. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/rogers_andrew_c_201408_ms
Chicago Manual of Style (16th Edition):
Rogers, Andrew Caleb. “Biomechanical analysis of canine stifle motion using custom in vitro
simulator.” 2014. Masters Thesis, University of Georgia. Accessed December 18, 2018.
http://purl.galileo.usg.edu/uga_etd/rogers_andrew_c_201408_ms.
MLA Handbook (7th Edition):
Rogers, Andrew Caleb. “Biomechanical analysis of canine stifle motion using custom in vitro
simulator.” 2014. Web. 18 Dec 2018.
Vancouver:
Rogers AC. Biomechanical analysis of canine stifle motion using custom in vitro
simulator. [Internet] [Masters thesis]. University of Georgia; 2014. [cited 2018 Dec 18].
Available from: http://purl.galileo.usg.edu/uga_etd/rogers_andrew_c_201408_ms.
Council of Science Editors:
Rogers AC. Biomechanical analysis of canine stifle motion using custom in vitro
simulator. [Masters Thesis]. University of Georgia; 2014. Available from: http://purl.galileo.usg.edu/uga_etd/rogers_andrew_c_201408_ms
University of Manitoba
5.
Chizewski, Michael George.
A biomechanical comparison of the long snap to punter between high school and university level football players.
Degree: Kinesiology and Recreation Management, 2009, University of Manitoba
URL: http://hdl.handle.net/1993/3224
► The study compared the kinematics used to perform fast and accurate long snaps in high school (HS) and university level (UNI) athletes. The study also…
(more)
▼ The study compared the kinematics used to perform fast and accurate long snaps in high school (HS) and university level (UNI) athletes. The study also determined the kinematic variables related to greater release velocity and which variables are significant predictors of release velocity or total snap time* (TST) for HS, UNI, and both groups combined*. Ten HS and ten UNI subjects were recruited. The athletes were filmed with eighty-three variables measured using Dartfish TeamPro 4.5.2 software. UNI athletes had significantly greater release velocity (15.15m/s) and left elbow extension velocity (752 deg/sec) than the HS group (13.21m/s and 498 deg/sec). TST had the strongest correlation to release velocity in HS (r=-0.915) and UNI snappers (r=-0.918). HS long snappers may benefit from less elbow flexion and more knee flexion in the set position. UNI long snappers may benefit from increased left elbow extension ROM and decreased shoulder flexion at release.
Advisors/Committee Members: Alexander, Marion J. L. (Kinesiology and Recreation Management) (supervisor), Gardiner, Phillip (Kinesiology and Recreation Management).
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Chizewski, M. G. (2009). A biomechanical comparison of the long snap to punter between high school and university level football players. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/3224
Chicago Manual of Style (16th Edition):
Chizewski, Michael George. “A biomechanical comparison of the long snap to punter between high school and university level football players.” 2009. Masters Thesis, University of Manitoba. Accessed December 18, 2018.
http://hdl.handle.net/1993/3224.
MLA Handbook (7th Edition):
Chizewski, Michael George. “A biomechanical comparison of the long snap to punter between high school and university level football players.” 2009. Web. 18 Dec 2018.
Vancouver:
Chizewski MG. A biomechanical comparison of the long snap to punter between high school and university level football players. [Internet] [Masters thesis]. University of Manitoba; 2009. [cited 2018 Dec 18].
Available from: http://hdl.handle.net/1993/3224.
Council of Science Editors:
Chizewski MG. A biomechanical comparison of the long snap to punter between high school and university level football players. [Masters Thesis]. University of Manitoba; 2009. Available from: http://hdl.handle.net/1993/3224
University of Toledo
6.
Parikh, Rachit D.
Biomechanical Comparison of Various Posterior Dynamic
Stabilization Systems for Different Grades of Facetectomy and
Decompression Surgery.
Degree: MS, Bioengineering, 2010, University of Toledo
URL: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290199598
► Spinal stenosis is a degenerative process, caused by progressive narrowing of the lumbar spinal canal and neural foramen, leading to a constriction of the nerve…
(more)
▼ Spinal stenosis is a degenerative process, caused by
progressive narrowing of the lumbar spinal canal and neural
foramen, leading to a constriction of the nerve roots of the cauda
equina. Currently, facetectomy and laminectomy combined with fusion
are the standard methods of decompression for the degenerative
lumbar spinal stenosis with resultant alteration in established
inter-relationships between various vertebral column components.
However due to myriad of degenerative complications at the fused
level and adjacent level degeneration, numerous new posterior
dynamic stabilization systems have been developed. The objective of
this biomechanical study was to investigate the influence of
different grades of factectomy, spinal decompression and
laminectomy procedures in conjunction with various dynamic
stabilization implants viz. Dynesys, In-Space spacer and
Stabilimax. A validated, 3-D, nonlinear finite element model of the
intact L3-S1 lumbar spine was used to evaluate the
biomechanics of
these devices. The load control protocol was used to evaluate these
devices. Various biomechanically relevant parameters like range of
motion, facet loading, disc stresses were evaluated. An in vitro
study was also performed comparing Dynesys with novel PEEK Rod
dynamic stabilization system for decompression surgery with
discectomy.The finite element results showed that the Dynesys and
Stabilimax systems were capable of stabilizing the decompression
surgery in flexion, extension and lateral bending. The In-Space
spacer effectively reduced motion in extension and did not
interfere with motion in other loading modes at the implanted
level. All the systems were capable of loading through the
intervertebral disc. Results also showed that after complete
facetectomy the systems did not restore stability in axial
rotation.Further a cadaveric study was to done to compare the
Dynesys stabilization system with that of a novel PEEK rod pedicle
screw stabilization system after simulating decompression surgery.
The biomechanical comparison of monosegmental fixation on L4-L5 and
bi-segmental fixation of L3-L5 as topping off procedure with fusion
were done for this study. The predicted range of motion for the
PEEK rod stabilization system was consistent with the Dynesys for
monosegmental fixation.
Advisors/Committee Members: Goel, Vijay (Advisor).
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Parikh, R. D. (2010). Biomechanical Comparison of Various Posterior Dynamic
Stabilization Systems for Different Grades of Facetectomy and
Decompression Surgery. (Masters Thesis). University of Toledo. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290199598
Chicago Manual of Style (16th Edition):
Parikh, Rachit D. “Biomechanical Comparison of Various Posterior Dynamic
Stabilization Systems for Different Grades of Facetectomy and
Decompression Surgery.” 2010. Masters Thesis, University of Toledo. Accessed December 18, 2018.
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290199598.
MLA Handbook (7th Edition):
Parikh, Rachit D. “Biomechanical Comparison of Various Posterior Dynamic
Stabilization Systems for Different Grades of Facetectomy and
Decompression Surgery.” 2010. Web. 18 Dec 2018.
Vancouver:
Parikh RD. Biomechanical Comparison of Various Posterior Dynamic
Stabilization Systems for Different Grades of Facetectomy and
Decompression Surgery. [Internet] [Masters thesis]. University of Toledo; 2010. [cited 2018 Dec 18].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290199598.
Council of Science Editors:
Parikh RD. Biomechanical Comparison of Various Posterior Dynamic
Stabilization Systems for Different Grades of Facetectomy and
Decompression Surgery. [Masters Thesis]. University of Toledo; 2010. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290199598
University of Windsor
7.
Diesbourg, Tara.
Cervical flexion relaxation phenomenon and the modulating effect of trunk flexion angle.
Degree: MA, Kinesiology, 2011, University of Windsor
URL: http://scholar.uwindsor.ca/etd/163
► The purpose of this study was to assess the presence of the flexion relaxation phenomenon (FRP) in cervical paraspinal musculature in an upright standing posture,…
(more)
▼ The purpose of this study was to assess the presence of the flexion relaxation phenomenon (FRP) in cervical paraspinal musculature in an upright standing posture, and to examine the modulating effect of non-neutral trunk postures on cervical FRP (cFRP). Cervical spinal angles and muscle activation patterns were monitored in 17 participants while performing a neck flexion task in six postures. EMG and angle traces from the flexion trials were used to determine the presence and magnitude of the cFRP (Extension Relaxation Ratio: ERR) and the cervical angles associated with cFRP (onset and cessation angles). The cFRP was observed in the cervical paraspinal muscles (CPS) muscles unilaterally in 11 participants (64.7 %), and bilaterally in 8 participants (47.1 %), across all postures and conditions. Onset angle was lower and ERR was higher in the 45░ trunk inclination condition compared to the upright and slumped conditions. ERRs and onset angles were not significantly different in the slumped condition compared to the upright condition. The data from this study contributed to the knowledge base for the under-researched area of cFRP.
Advisors/Committee Members: Azar, Nadia (Kinesiology).
Subjects/Keywords: Biomechanics.
Record Details
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APA ·
Chicago ·
MLA ·
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CSE |
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Diesbourg, T. (2011). Cervical flexion relaxation phenomenon and the modulating effect of trunk flexion angle. (Masters Thesis). University of Windsor. Retrieved from http://scholar.uwindsor.ca/etd/163
Chicago Manual of Style (16th Edition):
Diesbourg, Tara. “Cervical flexion relaxation phenomenon and the modulating effect of trunk flexion angle.” 2011. Masters Thesis, University of Windsor. Accessed December 18, 2018.
http://scholar.uwindsor.ca/etd/163.
MLA Handbook (7th Edition):
Diesbourg, Tara. “Cervical flexion relaxation phenomenon and the modulating effect of trunk flexion angle.” 2011. Web. 18 Dec 2018.
Vancouver:
Diesbourg T. Cervical flexion relaxation phenomenon and the modulating effect of trunk flexion angle. [Internet] [Masters thesis]. University of Windsor; 2011. [cited 2018 Dec 18].
Available from: http://scholar.uwindsor.ca/etd/163.
Council of Science Editors:
Diesbourg T. Cervical flexion relaxation phenomenon and the modulating effect of trunk flexion angle. [Masters Thesis]. University of Windsor; 2011. Available from: http://scholar.uwindsor.ca/etd/163
University of California – Berkeley
8.
Kim, Erica J.
Kinematics and Energetics of Anna's Hummingbirds (Calypte anna) performing hovering flight in ground effect, ascending and descending vertical flight, and forward flight in an asymmetric flow.
Degree: Biophysics, 2014, University of California – Berkeley
URL: http://www.escholarship.org/uc/item/9rr1f5xs
► Hummingbirds are exceptional among vertebrates in their extreme flight capabilities. They are unique in their ability to not only sustain hovering flight, but also to…
(more)
▼ Hummingbirds are exceptional among vertebrates in their extreme flight capabilities. They are unique in their ability to not only sustain hovering flight, but also to fly backwards, dive at high speeds, and perform quick alternations in flight speed and body orientation. Such capabilities require hummingbirds to have large metabolic power reserve, mechanical power output, force production, and maneuverability. These features, along with the relative ease of working with hummingbirds in a laboratory setting, make them a particularly convenient model system to assess different aspects of flight mechanics. Hence, this thesis is broadly on the flight performance of Anna's hummingbirds (Calypte anna) (seen in the above figure), a hummingbird species found year-round on the University of California, Berkeley campus, with each chapter focusing on a different flight mode: hovering flight in ground effect (chapter 1), vertically ascending steady flight (chapter 2), vertically descending steady flight (chapter 3), and forward flight in an asymmetric flow (chapter 4). The overall goal of each chapter is to gain a greater understanding of the aforementioned flight modes (e.g. what are the kinematic correlates of each flight mode, or what are the limits that constrain such a flight mode), all of which have not been previously analyzed in any detail.
Subjects/Keywords: Biomechanics
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APA ·
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APA (6th Edition):
Kim, E. J. (2014). Kinematics and Energetics of Anna's Hummingbirds (Calypte anna) performing hovering flight in ground effect, ascending and descending vertical flight, and forward flight in an asymmetric flow. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/9rr1f5xs
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kim, Erica J. “Kinematics and Energetics of Anna's Hummingbirds (Calypte anna) performing hovering flight in ground effect, ascending and descending vertical flight, and forward flight in an asymmetric flow.” 2014. Thesis, University of California – Berkeley. Accessed December 18, 2018.
http://www.escholarship.org/uc/item/9rr1f5xs.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kim, Erica J. “Kinematics and Energetics of Anna's Hummingbirds (Calypte anna) performing hovering flight in ground effect, ascending and descending vertical flight, and forward flight in an asymmetric flow.” 2014. Web. 18 Dec 2018.
Vancouver:
Kim EJ. Kinematics and Energetics of Anna's Hummingbirds (Calypte anna) performing hovering flight in ground effect, ascending and descending vertical flight, and forward flight in an asymmetric flow. [Internet] [Thesis]. University of California – Berkeley; 2014. [cited 2018 Dec 18].
Available from: http://www.escholarship.org/uc/item/9rr1f5xs.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kim EJ. Kinematics and Energetics of Anna's Hummingbirds (Calypte anna) performing hovering flight in ground effect, ascending and descending vertical flight, and forward flight in an asymmetric flow. [Thesis]. University of California – Berkeley; 2014. Available from: http://www.escholarship.org/uc/item/9rr1f5xs
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California – San Diego
9.
Gutierrez, Noelia Grande.
Assessment of Coronary Artery Aneurysms Cased By Kawasaki Diesease Using Transluminal Attenuation Gradient Analysis of CT Angiograms.
Degree: Engineering Sciences (Applied Mechanics), 2015, University of California – San Diego
URL: http://www.escholarship.org/uc/item/8tq7r7rb
► Patients with coronary artery aneurysms (CAA) resulting from Kawasaki Disease (KD) are at risk for thrombosis and myocardial infarction. Current guidelines recommend using CAA diameter…
(more)
▼ Patients with coronary artery aneurysms (CAA) resulting from Kawasaki Disease (KD) are at risk for thrombosis and myocardial infarction. Current guidelines recommend using CAA diameter >8 mm as the criterion for initiating systemic anticoagulation, but there is little outcome data to support this choice. Transluminal Attenuation Gradient (TAG) has been proposed as a non-invasive method for evaluating the functional significance of coronary stenoses using CT Angiography (CTA). However TAG has not previously been used to assess CAA. We hypothesized that abnormal flow dynamics in CAA caused by KD could be quantified using TAG. We quantified TAG in the major coronary arteries by performing linear regression of the average lumen intensity as a function of vessel length and compared TAG values for aneurysmal and normal arteries. Aneurysm geometry was characterized using maximum aneurysm diameter, aneurysm shape index and sphericity index. TAG of aneurysmal arteries was significantly lower than in normal arteries. Significant differences were also seen between aneurysmal vs. normal left anterior descending and right coronary. Geometrical parameters showed minimal to no correlation with TAG. This study is the first application of TAG analysis to CAA caused by KD, and demonstrates significantly different TAG values in aneurysmal versus normal arteries. Lack of correlation between TAG and CAA geometry suggests that TAG may provide information on hemodynamic conditions not available from anatomy alone. The use of TAG in KD patients represents a possible extension to standard CTA that could aid in clinical decision-making and help to better evaluate the risk of thrombus formation.
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Gutierrez, N. G. (2015). Assessment of Coronary Artery Aneurysms Cased By Kawasaki Diesease Using Transluminal Attenuation Gradient Analysis of CT Angiograms. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/8tq7r7rb
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gutierrez, Noelia Grande. “Assessment of Coronary Artery Aneurysms Cased By Kawasaki Diesease Using Transluminal Attenuation Gradient Analysis of CT Angiograms.” 2015. Thesis, University of California – San Diego. Accessed December 18, 2018.
http://www.escholarship.org/uc/item/8tq7r7rb.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gutierrez, Noelia Grande. “Assessment of Coronary Artery Aneurysms Cased By Kawasaki Diesease Using Transluminal Attenuation Gradient Analysis of CT Angiograms.” 2015. Web. 18 Dec 2018.
Vancouver:
Gutierrez NG. Assessment of Coronary Artery Aneurysms Cased By Kawasaki Diesease Using Transluminal Attenuation Gradient Analysis of CT Angiograms. [Internet] [Thesis]. University of California – San Diego; 2015. [cited 2018 Dec 18].
Available from: http://www.escholarship.org/uc/item/8tq7r7rb.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gutierrez NG. Assessment of Coronary Artery Aneurysms Cased By Kawasaki Diesease Using Transluminal Attenuation Gradient Analysis of CT Angiograms. [Thesis]. University of California – San Diego; 2015. Available from: http://www.escholarship.org/uc/item/8tq7r7rb
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California – San Diego
10.
Davey, Shruti Krishna.
3D Photopatterning of Hydrogels with Applications in Cancer Growth Models.
Degree: Bioengineering, 2016, University of California – San Diego
URL: http://www.escholarship.org/uc/item/0760g71g
► Techniques for cellular encapsulation within three-dimensional (3D) structures, such as bioprinting and patterning methods, play an important role in creating complex and hierarchically organized tissues,…
(more)
▼ Techniques for cellular encapsulation within three-dimensional (3D) structures, such as bioprinting and patterning methods, play an important role in creating complex and hierarchically organized tissues, as well as when studying cell-cell and cell-matrix interactions. To this end, advances in technologies have enabled development of methods to generate such 3D structures. We describe an easy-to-use photopatterning method involving photomask and a simple fluorescence microscope. This method is adapted to generate homogeneous and co-culture tissue constructs. Additionally, we extend this approach to establish a system to quantitatively study cancer spheroid growth. We developed a method combining the photomask-based 3D photopatterning technique with microfluidics technology to encapsulate a cancer spheroid within a patterned hydrogel embedded with fluorescent particles, monitor the cancer growth, and quantify the corresponding relative changes in the mechanical properties of the surrounding extracellular matrix (ECM). In this method, we applied hydrostatic pressure to compress the acellular and cell-laden gelatin methacrylate (GelMA) structure to detect volumetric strains. In the case of cell-laden GelMA hydrogel, we applied hydrostatic pressure at different culture timepoints, and recorded the changes in the local volumetric strains and compared it to a finite element simulation. We assess the possibility of this approach to deduce the approximate changes in the material properties during the cancer spheroid growth.
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Davey, S. K. (2016). 3D Photopatterning of Hydrogels with Applications in Cancer Growth Models. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/0760g71g
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Davey, Shruti Krishna. “3D Photopatterning of Hydrogels with Applications in Cancer Growth Models.” 2016. Thesis, University of California – San Diego. Accessed December 18, 2018.
http://www.escholarship.org/uc/item/0760g71g.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Davey, Shruti Krishna. “3D Photopatterning of Hydrogels with Applications in Cancer Growth Models.” 2016. Web. 18 Dec 2018.
Vancouver:
Davey SK. 3D Photopatterning of Hydrogels with Applications in Cancer Growth Models. [Internet] [Thesis]. University of California – San Diego; 2016. [cited 2018 Dec 18].
Available from: http://www.escholarship.org/uc/item/0760g71g.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Davey SK. 3D Photopatterning of Hydrogels with Applications in Cancer Growth Models. [Thesis]. University of California – San Diego; 2016. Available from: http://www.escholarship.org/uc/item/0760g71g
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California – Irvine
11.
Abbott, Emily M.
Muscles Stretch: factors that influence the active lengthening of skeletal muscles.
Degree: Biological Sciences, 2017, University of California – Irvine
URL: http://www.escholarship.org/uc/item/81q7h9hs
► Skeletal muscles not only accelerate our bodies during movement, they also play a crucial role in deceleration. During decelerating tasks, such as landing and braking,…
(more)
▼ Skeletal muscles not only accelerate our bodies during movement, they also play a crucial role in deceleration. During decelerating tasks, such as landing and braking, muscles are stretched while actively producing force in order to dissipate mechanical energy. One negative consequence of energy dissipation is that active lengthening can cause muscle damage. Muscles are dynamic and complex- their ability to vary architecture and timing of activation allows for incredible variation in mechanical function. The presence of in-series tendons magnifies this diversity of motor functions by 1) decoupling the length changes of the MTU from the length changes of the fascicle and 2) providing geographical space for fibers to attach to beyond bone. In this dissertation, we look at muscle-tendon factors that may affect active lengthening on the level of the whole muscle-tendon unit. These factors include timing of activation, muscle-tendon kinetics and morphology. Using in situ and in vitro muscle preparations, we found that early timing of activation is an important risk management strategy, rate of fascicle stretch is driven by relaxation rate of muscle and that pennation of fascicles may provide a protective advantage during high impact eccentric contractions.
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Abbott, E. M. (2017). Muscles Stretch: factors that influence the active lengthening of skeletal muscles. (Thesis). University of California – Irvine. Retrieved from http://www.escholarship.org/uc/item/81q7h9hs
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Abbott, Emily M. “Muscles Stretch: factors that influence the active lengthening of skeletal muscles.” 2017. Thesis, University of California – Irvine. Accessed December 18, 2018.
http://www.escholarship.org/uc/item/81q7h9hs.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Abbott, Emily M. “Muscles Stretch: factors that influence the active lengthening of skeletal muscles.” 2017. Web. 18 Dec 2018.
Vancouver:
Abbott EM. Muscles Stretch: factors that influence the active lengthening of skeletal muscles. [Internet] [Thesis]. University of California – Irvine; 2017. [cited 2018 Dec 18].
Available from: http://www.escholarship.org/uc/item/81q7h9hs.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Abbott EM. Muscles Stretch: factors that influence the active lengthening of skeletal muscles. [Thesis]. University of California – Irvine; 2017. Available from: http://www.escholarship.org/uc/item/81q7h9hs
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California – San Diego
12.
Gorgen, Vivian Anne.
A Microfluidic Device for the Study of Neutrophil Chemotaxis in 3D Environments.
Degree: Engineering Sciences (Mechanical Engineering), 2016, University of California – San Diego
URL: http://www.escholarship.org/uc/item/9120t9xp
► Cell migration is an important cellular process in many physiological events such as embryogenesis, wound healing, cancer metastasis, and inflammation. Chemotaxis is a process in…
(more)
▼ Cell migration is an important cellular process in many physiological events such as embryogenesis, wound healing, cancer metastasis, and inflammation. Chemotaxis is a process in which cells migrate in the direction of a chemical gradient. This process can be observed in the immune response, in which leukocytes will migrate from the vasculature into inflamed tissue. Advancements in fabrication technologies have lead to the development of many devices for studying in vitro chemotaxis. This thesis presents a hydrogel device that establishes a chemical gradient to study chemotaxis. The device creates the gradient using diffusion and maintains the stable, linear gradient using flow. The gradient profile was characterized by monitoring the diffusion of rhodamine to determine that a stable gradient can be established in 40 minutes. Differentiated HL-60 (dHL-60) cells were used as a model cell type to interrogate the capabilities of the device. These cells migrated in a directed manner when exposed to an fMLP gradient for 60 minutes with a mean CI of 0.6479. Several biochemical and mechanical experimental parameters, such as pre-activation of the dHL-60 cells and collagen gel concentration, can be further optimized to increase the chemotaxis response of the cells. This device enables the study of cells in 2D and 3D environments and was fabricated with readily available manufacturing tools – allowing for prototyping for new applications.
Subjects/Keywords: Biomechanics
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to Zotero / EndNote / Reference
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APA (6th Edition):
Gorgen, V. A. (2016). A Microfluidic Device for the Study of Neutrophil Chemotaxis in 3D Environments. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/9120t9xp
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gorgen, Vivian Anne. “A Microfluidic Device for the Study of Neutrophil Chemotaxis in 3D Environments.” 2016. Thesis, University of California – San Diego. Accessed December 18, 2018.
http://www.escholarship.org/uc/item/9120t9xp.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gorgen, Vivian Anne. “A Microfluidic Device for the Study of Neutrophil Chemotaxis in 3D Environments.” 2016. Web. 18 Dec 2018.
Vancouver:
Gorgen VA. A Microfluidic Device for the Study of Neutrophil Chemotaxis in 3D Environments. [Internet] [Thesis]. University of California – San Diego; 2016. [cited 2018 Dec 18].
Available from: http://www.escholarship.org/uc/item/9120t9xp.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gorgen VA. A Microfluidic Device for the Study of Neutrophil Chemotaxis in 3D Environments. [Thesis]. University of California – San Diego; 2016. Available from: http://www.escholarship.org/uc/item/9120t9xp
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Wake Forest University
13.
Lynch, Sarah Kathryn.
Characterization of Rib Cortical Bone Thickness Changes With Age and Sex.
Degree: 2015, Wake Forest University
URL: http://hdl.handle.net/10339/57148
► Motor vehicle crashes (MVCs) were the leading cause of unintentional fatal injuries and the fourth leading cause of unintentional nonfatal injuries in the United States…
(more)
▼ Motor vehicle crashes (MVCs) were the leading cause of unintentional fatal injuries and the fourth leading cause of unintentional nonfatal injuries in the United States in 2007. Of these injuries, the thoracic injuries rank second in terms of frequency as well as overall economic cost. Of the thoracic injuries, rib fractures are extremely common; present in nearly 94% of severely injured belted occupants. Elderly occupants have increased mortality and morbidity associated with rib fractures. One factor that is thought to influence rib fracture that changes with age (possibly contributing to increased injury risk in the elderly population) is the rib cortical bone.
Subjects/Keywords: Biomechanics
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APA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lynch, S. K. (2015). Characterization of Rib Cortical Bone Thickness Changes With Age and Sex. (Thesis). Wake Forest University. Retrieved from http://hdl.handle.net/10339/57148
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lynch, Sarah Kathryn. “Characterization of Rib Cortical Bone Thickness Changes With Age and Sex.” 2015. Thesis, Wake Forest University. Accessed December 18, 2018.
http://hdl.handle.net/10339/57148.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lynch, Sarah Kathryn. “Characterization of Rib Cortical Bone Thickness Changes With Age and Sex.” 2015. Web. 18 Dec 2018.
Vancouver:
Lynch SK. Characterization of Rib Cortical Bone Thickness Changes With Age and Sex. [Internet] [Thesis]. Wake Forest University; 2015. [cited 2018 Dec 18].
Available from: http://hdl.handle.net/10339/57148.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lynch SK. Characterization of Rib Cortical Bone Thickness Changes With Age and Sex. [Thesis]. Wake Forest University; 2015. Available from: http://hdl.handle.net/10339/57148
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California – Berkeley
14.
Jreij, Pamela.
The Mechanoregulation of the Actin Cytoskeleton.
Degree: Bioengineering, 2016, University of California – Berkeley
URL: http://www.escholarship.org/uc/item/39d5z9rv
► The actin cytoskeleton is essential for maintaining mechanical integrity of cells and tissues and for providing structural support during dynamic processes including migration, endocytosis and…
(more)
▼ The actin cytoskeleton is essential for maintaining mechanical integrity of cells and tissues and for providing structural support during dynamic processes including migration, endocytosis and cytokinesis. From a molecular perspective, it consists of (1) actin monomers polymerized in double helical filamentous structures and (2) an ensemble of regulatory proteins that regulate shape and function of actin structures. From a mechanics perspective, the cytoskeleton is a dynamic entity that can generate force while being subject to various load perturbations. Though molecular understanding of actin networks is extensive, our understanding of how molecular signaling is converted to force output and how force input feeds back into molecular activity remains limited. The goal of this dissertation is to investigate how the interplay between molecular and mechanical attributes of the actin cytoskeleton results in desired cellular activity and physiological phenotypes. We first focus on the leading edge of migrating cells where nucleation of branched actin structures is involved in membrane protrusion. In chapter 2, we investigate the effect of the biochemical composition of these structures on the observed dynamic properties of network growth. To do so, we reconstitute branched actin network assembly using a minimal set of essential proteins (i.e. nucleation promoting factors, ARP2/3 and capping proteins) and evaluate their role over a broad range of concentrations. We find that in the absence of opposing force, changes in the nanomolar range of soluble protein concentration significantly modulates architectural and kinetic properties of nucleating actin structures. In cells, branched actin networks do not just transmit forces in the form of protrusion but also resists opposing load imposed by the membrane and other physical barriers. In chapter 3, we use atomic force microscopy to study the impact of external force on the biochemical composition and mechanical properties of reconstituted branched actin structures. Interestingly, we find that mechanical loading alters network density and composition, which in turn modulates its bulk mechanical properties and renders it stiffer, more powerful and efficient. Central to assembly and function of actin networks is the activity of actin binding proteins. We next extend our investigation to ask whether forces on actin filaments can influence actin binding protein (ABP) localization and activity in the cytoskeleton. Despite sharing the same cytoplasm, ABPs in cells spatially segregate and differentially regulate actin structures. In the context of the leading edge of migrating cells, cofilin binds and severs filaments in the lamellipodia, whereas tropomyosin is secluded as it binds and stabilizes filaments in the lamellum. In chapter 4, we hypothesize that these proteins are mechanosensitive and show that cofilin preferentially binds to network structures subject to compression whereas tropomyosin favors relaxed structures. Lastly, in chapter 5, we explore the sensitivity of calponin…
Subjects/Keywords: Biomechanics
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Jreij, P. (2016). The Mechanoregulation of the Actin Cytoskeleton. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/39d5z9rv
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Jreij, Pamela. “The Mechanoregulation of the Actin Cytoskeleton.” 2016. Thesis, University of California – Berkeley. Accessed December 18, 2018.
http://www.escholarship.org/uc/item/39d5z9rv.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jreij, Pamela. “The Mechanoregulation of the Actin Cytoskeleton.” 2016. Web. 18 Dec 2018.
Vancouver:
Jreij P. The Mechanoregulation of the Actin Cytoskeleton. [Internet] [Thesis]. University of California – Berkeley; 2016. [cited 2018 Dec 18].
Available from: http://www.escholarship.org/uc/item/39d5z9rv.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jreij P. The Mechanoregulation of the Actin Cytoskeleton. [Thesis]. University of California – Berkeley; 2016. Available from: http://www.escholarship.org/uc/item/39d5z9rv
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
15.
Burns, Cameron Tylor.
Using Measures of Biomechanics, Physical Activity, and Physical Fitness to Evaluate Risk of Law Back Pain in Nursing Students.
Degree: MSc -MS, Kinesiology & Health Science, 2018, York University
URL: http://hdl.handle.net/10315/34555
► Recent research has suggested that physical fitness, physical activity, and biomechanical factors relate to low back injury development. However, these works used established workers (including…
(more)
▼ Recent research has suggested that physical fitness, physical activity, and biomechanical factors relate to low back injury development. However, these works used established workers (including practicing nurses), making it difficult to identify potential predisposing characteristics that could be targeted in preventative efforts. Likewise, fourteen female nursing students were assessed using six biomechanical, two physical activity, and three physical fitness variables. Participants were grouped based on transient pain development, an established predictor of increased low back injury risk, during the 60 minute data collection. Transient pain developers (n=6) had reductions in some physical fitness and biomechanical variables (muscular strength, endurance, postural stability, and lumbopelvic control) but had no differences in any of the physical activity variables. These findings suggest improvements in physical fitness and/or the biomechanical variables have potential in nursing students to reduce their transient pain development, which may reduce their risk of developing a future low back injury.
Advisors/Committee Members: Drake, Janessa D. M. (advisor).
Subjects/Keywords: Biomechanics
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APA ·
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APA (6th Edition):
Burns, C. T. (2018). Using Measures of Biomechanics, Physical Activity, and Physical Fitness to Evaluate Risk of Law Back Pain in Nursing Students. (Masters Thesis). York University. Retrieved from http://hdl.handle.net/10315/34555
Chicago Manual of Style (16th Edition):
Burns, Cameron Tylor. “Using Measures of Biomechanics, Physical Activity, and Physical Fitness to Evaluate Risk of Law Back Pain in Nursing Students.” 2018. Masters Thesis, York University. Accessed December 18, 2018.
http://hdl.handle.net/10315/34555.
MLA Handbook (7th Edition):
Burns, Cameron Tylor. “Using Measures of Biomechanics, Physical Activity, and Physical Fitness to Evaluate Risk of Law Back Pain in Nursing Students.” 2018. Web. 18 Dec 2018.
Vancouver:
Burns CT. Using Measures of Biomechanics, Physical Activity, and Physical Fitness to Evaluate Risk of Law Back Pain in Nursing Students. [Internet] [Masters thesis]. York University; 2018. [cited 2018 Dec 18].
Available from: http://hdl.handle.net/10315/34555.
Council of Science Editors:
Burns CT. Using Measures of Biomechanics, Physical Activity, and Physical Fitness to Evaluate Risk of Law Back Pain in Nursing Students. [Masters Thesis]. York University; 2018. Available from: http://hdl.handle.net/10315/34555
Wilfrid Laurier University
16.
Kirst, Colin.
A COMPARISON OF THE STABILITY & PRESSURE DISTRIBUTION BETWEEN YOUNG ADULTS AND A TRANSTIBIAL AMPUTEE DURING OBSTACLE CROSSING.
Degree: 2018, Wilfrid Laurier University
URL: https://scholars.wlu.ca/etd/2072
► Falls are identified as the largest risk and leading cause of injury for multiple populations, including young adults and individuals with a transtibial amputation. Furthermore,…
(more)
▼ Falls are identified as the largest risk and leading cause of injury for multiple populations, including young adults and individuals with a transtibial amputation. Furthermore, obstacle crossing is identified as the number one cause of a trip, which subsequently leads to falling. Previous research provides conflicting results and a lack of specificity in certain outcome measures of dynamic stability during obstacle crossing. Therefore, the purpose of this thesis was to gain foundational knowledge on outcome measures related to dynamic stability during an obstacle crossing protocol. An additional purpose was to investigate the dynamic stability of young adults, and speculate on the dynamic stability of a transtibial amputee following the same protocol. It was hypothesized for both young adults and the transtibial amputee, as obstacle height increased, the medial/lateral distance of the COM-BOS relationship will decrease, the medial/lateral distance between the COM-COP will increase, and that there would be increased variability in both peak and regional pressure of the trail limb during single support. Twenty young adults (aged 24.3 ± 2.9) and one transtibial amputee (age 27) completed six trials of level ground walking and 18 blocked and randomized trials of obstacle crossing at three heights (5 cm, 15 cm and 25 cm). Outcome measures for this study included: minimum and maximum medial/lateral COM-BOS, minimum and maximum M/L COM-COP, peak total and peak regional pressure distribution, step length, step width, and minimum toe clearance. A series of repeated measures analysis of variance (ANOVA) were performed on the young adult data, whereas the transtibial amputee results were interpreted based off of mean and standard deviation values. As obstacle height increased the minimum medial/lateral (M/L) centre of mass (COM) and centre of pressure (COP) distance significantly decreased (p<0.0001), total peak pressure significantly increased (p<0.0001), and pressure in the heel, lateral midfoot and toe regions of the trail limb significantly increased (p<0.0001) for the young adults. Furthermore, minimum toe clearance (MTC) was significantly lowest at level ground walking, while largest at the 5cm, and then significantly decreased as obstacle height continued to increase (p<0.05). Finally, step length significantly increased compared to level ground walking (p<0.0001). Conversely, the transtibial amputee showed lower total peak pressure, smaller step width, COM-base of support (BOS), COM-COP, and MTC distances. Ultimately, the results indicate obstacle height significantly influenced COM-COP, total peak pressure, regional differences in pressure, MTC, and step lengths of the young adults. Secondary interpretation of the transtibial amputee shows that the individual utilized a less conservative strategy and was therefore less stable compared to the young adults. Even though this individual was less stable than the young adults, he was still able to maintain enough dynamic stability during level ground walking and obstacle…
Subjects/Keywords: Biomechanics
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APA ·
Chicago ·
MLA ·
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Export
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APA (6th Edition):
Kirst, C. (2018). A COMPARISON OF THE STABILITY & PRESSURE DISTRIBUTION BETWEEN YOUNG ADULTS AND A TRANSTIBIAL AMPUTEE DURING OBSTACLE CROSSING. (Thesis). Wilfrid Laurier University. Retrieved from https://scholars.wlu.ca/etd/2072
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kirst, Colin. “A COMPARISON OF THE STABILITY & PRESSURE DISTRIBUTION BETWEEN YOUNG ADULTS AND A TRANSTIBIAL AMPUTEE DURING OBSTACLE CROSSING.” 2018. Thesis, Wilfrid Laurier University. Accessed December 18, 2018.
https://scholars.wlu.ca/etd/2072.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kirst, Colin. “A COMPARISON OF THE STABILITY & PRESSURE DISTRIBUTION BETWEEN YOUNG ADULTS AND A TRANSTIBIAL AMPUTEE DURING OBSTACLE CROSSING.” 2018. Web. 18 Dec 2018.
Vancouver:
Kirst C. A COMPARISON OF THE STABILITY & PRESSURE DISTRIBUTION BETWEEN YOUNG ADULTS AND A TRANSTIBIAL AMPUTEE DURING OBSTACLE CROSSING. [Internet] [Thesis]. Wilfrid Laurier University; 2018. [cited 2018 Dec 18].
Available from: https://scholars.wlu.ca/etd/2072.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kirst C. A COMPARISON OF THE STABILITY & PRESSURE DISTRIBUTION BETWEEN YOUNG ADULTS AND A TRANSTIBIAL AMPUTEE DURING OBSTACLE CROSSING. [Thesis]. Wilfrid Laurier University; 2018. Available from: https://scholars.wlu.ca/etd/2072
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New Mexico
17.
Abbasi, Cyrus.
A selection of biomechanical research problems : from modeling to experimentation.
Degree: Mechanical Engineering, 2013, University of New Mexico
URL: http://hdl.handle.net/1928/23305
► The research undertakings within this manuscript illustrate the importance of biomechanics in todays science. Without doubt, biomechanics can be utilized to obtain a better understanding…
(more)
▼ The research undertakings within this manuscript illustrate the importance of
biomechanics in todays science. Without doubt,
biomechanics can be utilized to obtain a better understanding of many unsolved mysteries involved in the field of medicine. Moreover,
biomechanics can be used to develop better prosthetic or surgical devices as well. Chapter 2 represents a medical problem, which has not been solved for more than a century. With the use of fundamental principles of
biomechanics, a better insight of this problem and its possible causes were obtained. Chapter 3 investigates the mechanical interaction between the human teeth and some processed food products during mastication, which is a routine but crucial daily activity of a human being. Chapter 4 looks at a problem within the field of surgery. In this chapter the stability and reliability of two different suturing techniques are explored. Chapters 5 and 6 represent new patent designs as a result of the investigations made in Chapter 4. Chapter 7 studies the impact and load transfer patterns during the collision between a child's head and the ground. All of the above mentioned chapters show the significance of
biomechanics in solving a range of different medical problems that involve physical and or mechanical characters.'
Advisors/Committee Members: Khraishi, Tariq, Khraishi, Tariq, Shen, Yu-Lin, Baack, Bret, Harrison, Thomas.
Subjects/Keywords: Biomechanics.
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APA (6th Edition):
Abbasi, C. (2013). A selection of biomechanical research problems : from modeling to experimentation. (Doctoral Dissertation). University of New Mexico. Retrieved from http://hdl.handle.net/1928/23305
Chicago Manual of Style (16th Edition):
Abbasi, Cyrus. “A selection of biomechanical research problems : from modeling to experimentation.” 2013. Doctoral Dissertation, University of New Mexico. Accessed December 18, 2018.
http://hdl.handle.net/1928/23305.
MLA Handbook (7th Edition):
Abbasi, Cyrus. “A selection of biomechanical research problems : from modeling to experimentation.” 2013. Web. 18 Dec 2018.
Vancouver:
Abbasi C. A selection of biomechanical research problems : from modeling to experimentation. [Internet] [Doctoral dissertation]. University of New Mexico; 2013. [cited 2018 Dec 18].
Available from: http://hdl.handle.net/1928/23305.
Council of Science Editors:
Abbasi C. A selection of biomechanical research problems : from modeling to experimentation. [Doctoral Dissertation]. University of New Mexico; 2013. Available from: http://hdl.handle.net/1928/23305
18.
Warschun, Briana Michele.
Changes in Bone Morphology with Carpometacarpal
Osteoarthritis.
Degree: Biomedical Engineering, 2017, Brown University
URL: https://repository.library.brown.edu/studio/item/bdr:733557/
► Characterizing the morphology of the carpometacarpal (CMC) joint and how it changes with osteoarthritis progression is important for understanding the pathoetiology of this multifactorial disease.…
(more)
▼ Characterizing the morphology of the carpometacarpal
(CMC) joint and how it changes with osteoarthritis progression is
important for understanding the pathoetiology of this
multifactorial disease. The purpose of this longitudinal in vivo
study was to quantitatively describe shape and morphology changes
associated with OA progression from enrollment to 3.0 yr follow-up
and to determine if and how these changes may differ with sex.
Computed tomography scans from 74 subjects with early CMC OA and 24
healthy (control) age-matched subjects were used to obtain 3-D bone
models. The trapezial and metacarpal articular surfaces were
manually described and compared among sex and health groups using a
scalar measure of average differences across facet surface shape as
well as a novel scalar measure of the relative position of the
facet surface with respect to bone inertia to describe facet
orientation. We found that with OA progression bone volume will
increase and CMC articulation becomes more curved in the
dorsal-volar direction in both men and women. These findings
support a modest effect of OA progression on the shape and
morphology of the CMC articulation and these changes are likely to
continue to increase over time as OA progresses. Likewise, we found
sex-related differences among the trapezia facet orientation, which
may play a factor in the higher CMC OA prevalence in women than in
men.
Advisors/Committee Members: Schell, Jacquelyn (Reader), Franck, Christian (Reader), Crisco, Joseph J. (Advisor).
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Warschun, B. M. (2017). Changes in Bone Morphology with Carpometacarpal
Osteoarthritis. (Thesis). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:733557/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Warschun, Briana Michele. “Changes in Bone Morphology with Carpometacarpal
Osteoarthritis.” 2017. Thesis, Brown University. Accessed December 18, 2018.
https://repository.library.brown.edu/studio/item/bdr:733557/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Warschun, Briana Michele. “Changes in Bone Morphology with Carpometacarpal
Osteoarthritis.” 2017. Web. 18 Dec 2018.
Vancouver:
Warschun BM. Changes in Bone Morphology with Carpometacarpal
Osteoarthritis. [Internet] [Thesis]. Brown University; 2017. [cited 2018 Dec 18].
Available from: https://repository.library.brown.edu/studio/item/bdr:733557/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Warschun BM. Changes in Bone Morphology with Carpometacarpal
Osteoarthritis. [Thesis]. Brown University; 2017. Available from: https://repository.library.brown.edu/studio/item/bdr:733557/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Boston University
19.
Mattson, Jeffrey.
Mechanical and structural contributions of extracellular matrix constituents to vascular mechanics.
Degree: PhD, Mechanical Engineering, 2017, Boston University
URL: http://hdl.handle.net/2144/27010
► Elastic and collagen fibers are the major load-bearing extracellular matrix (ECM) constituents of the vascular wall. Elastic fibers accommodate repeated cycles of extension and recoil…
(more)
▼ Elastic and collagen fibers are the major load-bearing extracellular matrix (ECM) constituents of the vascular wall. Elastic fibers accommodate repeated cycles of extension and recoil that occur during pulsatile blood flow at lower levels of strain, whereas the recruitment of collagen fibers at higher levels of strain leads to nonlinear stiffening that protects blood vessels from overextension. Glycosaminoglycans (GAGs) provide a structural basis for multiple biological functions, such as the organization of ECM and the regulation of cell growth factors. There exists a complex interdependence of ECM compositional, structural, and mechanical properties. The overall goal of the research is to study the biomechanical and structural roles of different ECM constituents in vascular mechanics through coupled mechanical testing, advanced optical imaging, and microstructure-based constitutive modeling.
Arteries function differently than veins in the circulatory system, however in several treatment options veins are subjected to sudden elevated arterial pressure. Our study improves the understanding of elastin and collagen fiber contribution to ECM mechanics of different vessel types. Our research demonstrates that ECM fiber distribution, recruitment, and content each play an important role in vascular function, and the important structural and functional differences between arteries and veins that should be taken into account when considering treatment options. While elastin and collagen have received extensive consideration, little is known about the biomechanical roles of GAGs in blood vessels. The mechanics of tissue with low GAG content can be indirectly affected by the interaction of GAGs with collagen fibers, which is one of the primary contributors to arterial mechanics. Our study suggests that that the interaction between GAGs and other ECM constituents plays an important role in the mechanics of the arterial wall, and GAGs should be considered in addition to elastic and collagen fibers when studying arterial function. A structure-based constitutive model was then developed to successfully predict arterial mechanics considering the contribution of GAGs to fiber recruitment. Building upon previous research, ongoing work is presented to study the fundamental yet clinically relevant structural-mechanical behavior of arterial ECM in diabetes using an integrated experimental and modeling approach.
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Mattson, J. (2017). Mechanical and structural contributions of extracellular matrix constituents to vascular mechanics. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/27010
Chicago Manual of Style (16th Edition):
Mattson, Jeffrey. “Mechanical and structural contributions of extracellular matrix constituents to vascular mechanics.” 2017. Doctoral Dissertation, Boston University. Accessed December 18, 2018.
http://hdl.handle.net/2144/27010.
MLA Handbook (7th Edition):
Mattson, Jeffrey. “Mechanical and structural contributions of extracellular matrix constituents to vascular mechanics.” 2017. Web. 18 Dec 2018.
Vancouver:
Mattson J. Mechanical and structural contributions of extracellular matrix constituents to vascular mechanics. [Internet] [Doctoral dissertation]. Boston University; 2017. [cited 2018 Dec 18].
Available from: http://hdl.handle.net/2144/27010.
Council of Science Editors:
Mattson J. Mechanical and structural contributions of extracellular matrix constituents to vascular mechanics. [Doctoral Dissertation]. Boston University; 2017. Available from: http://hdl.handle.net/2144/27010
Boston University
20.
Mohan, Sumati.
The role of smooth muscle cell fluidization in the pathogenesis of pulmonary arterial hypertension.
Degree: 2014, Boston University
URL: http://hdl.handle.net/2144/14383
► During the progression of pulmonary arterial hypertension (PAH), the smooth muscle of the pulmonary artery changes phenotypically in several ways. Although many of these changes…
(more)
▼ During the progression of pulmonary arterial hypertension (PAH), the smooth muscle of the pulmonary artery changes phenotypically in several ways. Although many of these changes have been characterized, more remains to be understood about the mechanical properties of pulmonary arterial smooth muscle (PASM) cells and their role in PAH. To address this, PASM cells were studied using traction force microscopy to test their fluidization response to stretch, to determine if changes in contractility occur in the setting of PAH, and to screen a preliminary set of myosin inhibitors for those which relax the cell. As predicted, PASM cells produced a similar fluidization-resolidification response to transient stretch as shown in previous studies of other smooth muscle cell types. Although the statistical significance is not strong (p=0.082), PASM cells incubated in serum from PAH patients did show an increased average baseline contractility compared to cells treated with serum from normal volunteers. Of three myosin inhibitors tested, blebbistatin had a statistically significant (p=0.002) reduction in baseline contractility compared to untreated control cells. Taken together, these results support the hypothesis that stretch-induced fluidization is a feature of the normal PASM cell and suggest that factors in the PAH milieu may cause changes in the PASM cell, yielding a more contractile phenotype. A possible avenue for treating PAH may lie in using myosin inhibitor drugs such as blebbistatin to reduce contractility of the PASM cell.
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Mohan, S. (2014). The role of smooth muscle cell fluidization in the pathogenesis of pulmonary arterial hypertension. (Thesis). Boston University. Retrieved from http://hdl.handle.net/2144/14383
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mohan, Sumati. “The role of smooth muscle cell fluidization in the pathogenesis of pulmonary arterial hypertension.” 2014. Thesis, Boston University. Accessed December 18, 2018.
http://hdl.handle.net/2144/14383.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mohan, Sumati. “The role of smooth muscle cell fluidization in the pathogenesis of pulmonary arterial hypertension.” 2014. Web. 18 Dec 2018.
Vancouver:
Mohan S. The role of smooth muscle cell fluidization in the pathogenesis of pulmonary arterial hypertension. [Internet] [Thesis]. Boston University; 2014. [cited 2018 Dec 18].
Available from: http://hdl.handle.net/2144/14383.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mohan S. The role of smooth muscle cell fluidization in the pathogenesis of pulmonary arterial hypertension. [Thesis]. Boston University; 2014. Available from: http://hdl.handle.net/2144/14383
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Boston University
21.
Zollinger, Alicia.
Tensional homeostasis: role of cell properties and the environment.
Degree: PhD, Biomedical Engineering, 2018, Boston University
URL: http://hdl.handle.net/2144/32320
► Physiological tissue exists in a state of tension. Maintenance of this tension at a set level, a process termed tensional homeostasis, is imperative to the…
(more)
▼ Physiological tissue exists in a state of tension. Maintenance of this tension at a set level, a process termed tensional homeostasis, is imperative to the preservation of healthy cells and tissues, and multiple diseases such as cancer and atherosclerosis have been linked to the loss of the ability to maintain it. Despite this, very little is known about how this tension is established and maintained at the cellular level. Early reports on tensional homeostasis, which observed large cohorts of cells, hypothesized that constant tension levels exist at all length scales, including the cellular and subcellular length scales. Therefore, the main goal of this thesis was to begin to understand tensional homeostasis at the cellular level.
In this thesis, we explore the impacts of both cell properties and environmental factors on the traction force dynamics of single cells and clusters of cells to try to understand how they establish and maintain tensional homeostasis. We observed that multicellularity is necessary for tensional homeostasis in endothelial cells, but that this phenomenon is cell type specific. Cell types like smooth muscle and fibroblasts maintain steady force at the single cell level. We explored the differences that might drive this difference and found that the cell adhesion protein cadherin is essential to tensional homeostasis and that inflammatory signaling can lead to its loss. We also work towards the creation of a tool that will allow us to better recapitulate in vivo conditions, which will allow us to study tensional homeostasis at the single cell level in the physiological context of cyclic stretch.
This work suggests that tensional homeostasis is a complex process that is influenced by both internal and environmental factors. Some of these factors, like E-cadherin, which were previously known to affect mechanobiology may be more complex than previously realized. Finally, this thesis makes it clear that to fully understand how cells establish the homeostasis seen at the tissue level, we must look at traction dynamics rather than just a single snapshot in time. Studying tensional homeostasis in dynamic states may be essential to understanding processes such as wound healing, development, and disease progression.
Advisors/Committee Members: Smith, Michael L. (advisor).
Subjects/Keywords: Biomechanics
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APA (6th Edition):
Zollinger, A. (2018). Tensional homeostasis: role of cell properties and the environment. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/32320
Chicago Manual of Style (16th Edition):
Zollinger, Alicia. “Tensional homeostasis: role of cell properties and the environment.” 2018. Doctoral Dissertation, Boston University. Accessed December 18, 2018.
http://hdl.handle.net/2144/32320.
MLA Handbook (7th Edition):
Zollinger, Alicia. “Tensional homeostasis: role of cell properties and the environment.” 2018. Web. 18 Dec 2018.
Vancouver:
Zollinger A. Tensional homeostasis: role of cell properties and the environment. [Internet] [Doctoral dissertation]. Boston University; 2018. [cited 2018 Dec 18].
Available from: http://hdl.handle.net/2144/32320.
Council of Science Editors:
Zollinger A. Tensional homeostasis: role of cell properties and the environment. [Doctoral Dissertation]. Boston University; 2018. Available from: http://hdl.handle.net/2144/32320
University of Arkansas
22.
Payne, Marcus.
The Impact of UPC Placement on the Biomechanical Injury Risk Factors Associated with Cashier Work.
Degree: MS, 2018, University of Arkansas
URL: http://scholarworks.uark.edu/etd/2818
► The purpose of this study was to investigate the impact of UPC placement on upper-body kinematics and muscle activity associated with cashier work. Seventeen…
(more)
▼ The purpose of this study was to investigate the impact of UPC placement on upper-body kinematics and muscle activity associated with cashier work. Seventeen female participants who had worked at least 1000 hours as a cashier and did not meet any exclusion criteria were recruited. Multi-sided UPC items, which included extra and/or larger barcodes, were compared to items with a traditional UPC placement. Two mock carts of eighteen items were scanned for each UPC type. Electromyography was applied bilaterally to the biceps brachii, middle deltoid, flexor digitorum superficialis, and upper trapezius muscles. Cumulative and peak muscle activity were calculated for each trial. Motion capture was placed on the torso, upper arm, forearm, and hand segments and tracked using a Qualysis motion capture system. Range of motion (ROM) values for shoulder flexion/extension, abduction/adduction, and internal/external rotation were calculated. The time to scan each cart from initial movement to return to starting position was also measured. A main effect of UPC type on cumulative muscle activity was found for all muscles (biceps brachii p=.002, middle deltoid p=.003, flexor digitorum p=.001, upper trapezius p=.001), all were lower with multi-sided UPC. For peak muscle activity, there was an interaction between UPC type and side (p=.036), values on the left were lower with multi-sided UPC items. There was also an interaction between UPC type and side for flexion/extension ROM (p=.031), with multi-sided UPC items reducing ROM by an average of 6 degrees. Mock carts with traditional items took an average a 5 fewer seconds to complete. Future studies should investigate if the increased efficiency and lower cumulative muscle activity is beneficial over the course of an entire work shift.
Advisors/Committee Members: Kaitlin Gallagher, Michelle Gray, Tyrone Washington.
Subjects/Keywords: Biomechanics; Ergonomics; Biomechanics
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APA (6th Edition):
Payne, M. (2018). The Impact of UPC Placement on the Biomechanical Injury Risk Factors Associated with Cashier Work. (Masters Thesis). University of Arkansas. Retrieved from http://scholarworks.uark.edu/etd/2818
Chicago Manual of Style (16th Edition):
Payne, Marcus. “The Impact of UPC Placement on the Biomechanical Injury Risk Factors Associated with Cashier Work.” 2018. Masters Thesis, University of Arkansas. Accessed December 18, 2018.
http://scholarworks.uark.edu/etd/2818.
MLA Handbook (7th Edition):
Payne, Marcus. “The Impact of UPC Placement on the Biomechanical Injury Risk Factors Associated with Cashier Work.” 2018. Web. 18 Dec 2018.
Vancouver:
Payne M. The Impact of UPC Placement on the Biomechanical Injury Risk Factors Associated with Cashier Work. [Internet] [Masters thesis]. University of Arkansas; 2018. [cited 2018 Dec 18].
Available from: http://scholarworks.uark.edu/etd/2818.
Council of Science Editors:
Payne M. The Impact of UPC Placement on the Biomechanical Injury Risk Factors Associated with Cashier Work. [Masters Thesis]. University of Arkansas; 2018. Available from: http://scholarworks.uark.edu/etd/2818
University of Cincinnati
23.
Coombs, Matthew T.
Development of an experimental method to identify structural
properties of the intervertebral joint after spine staple
implantation under simulated physiologic loads.
Degree: MS, Engineering and Applied Science: Mechanical
Engineering, 2011, University of Cincinnati
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1322052236
► Current surgical techniques for scoliosis correction are successful in achieving good long-term outcomes. However these surgical approaches involve fusion of the spine resulting in…
(more)
▼ Current surgical techniques for scoliosis
correction are successful in achieving good long-term outcomes.
However these surgical approaches involve fusion of the spine
resulting in stresses above physiologic levels on the adjacent
spine segments and extensive spine exposure. Experimental surgical
approaches are being explored as potential alternatives, including
mechanically altering spine growth through staple
hemiepiphysiodesis. The goal of staple hemiepiphysiodesis is to
generate asymmetric compressive stresses across the growth plate to
modulate growth rate, without critically decreasing intervertebral
disc mobility. The immediate post-operative effects of spine
stapling on the biomechanical properties of the spine have not been
fully reported. Further, while the effects of this and related
methods are a function of both loading direction and distance from
the implant, no previous biomechanical study has reported bilateral
differences in vertebral joint stiffness or displacement gradients
as a function of loading direction or proximity to the staple. The
purpose of this study was to develop a method to test whether
staple hemiepiphysiodesis caused an initial coronal plane gradient
in disc stiffness and mobility. In-vitro
biomechanical testing, applying pure unconstrained moments with an
independent axial compressive preload, is one method for evaluating
treatment effects on the spine. A fixed frame cable driven test
assembly capable of applying pure unconstrained moments to the
specimen with an independent axial compressive preload was designed
and developed. Pure moments were applied to functional spinal units
before and after staple implantation to measure changes in
stiffness in lateral bending, flexion/extension and axial
rotation. Biomechanical tests were conducted on
six thoracic functional spinal units of skeletally immature pigs in
lateral bending, flexion/extension and axial rotation before and
after stapling, with and without a 250 N axial compressive preload.
Treatment effect was determined by paired differences for changes
in vertebral joint neutral zone, tangent stiffness and displacement
on the ipsilateral side. Preliminary results with only
moment-rotation for the fifth loading cycle suggest there are no
significant differences in joint neutral zone or tangent stiffness
parameters following spinal stapling. Analysis of the displacement
on the ipsilateral side in lateral bending towards the staple
showed that the vertebral joint was not immobilized after
stapling. Staple hemiepiphysiodesis affects the
distribution of static and dynamic compressive stresses in the disc
and vertebral growth plate, for the purpose of asymmetrically
modulating vertebral growth. Defining initial post-operative
changes is important to the timing of differential growth
treatments and the identification of possible side effects. The
efficacy and side effects of mechanical growth modulation likely
depends on the initial biomechanical changes due to the specific
treatment as well. Towards these ends, a…
Advisors/Committee Members: Kim, J. (Committee Chair).
Subjects/Keywords: Biomechanics; spine; biomechanics
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Manager
APA (6th Edition):
Coombs, M. T. (2011). Development of an experimental method to identify structural
properties of the intervertebral joint after spine staple
implantation under simulated physiologic loads. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1322052236
Chicago Manual of Style (16th Edition):
Coombs, Matthew T. “Development of an experimental method to identify structural
properties of the intervertebral joint after spine staple
implantation under simulated physiologic loads.” 2011. Masters Thesis, University of Cincinnati. Accessed December 18, 2018.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1322052236.
MLA Handbook (7th Edition):
Coombs, Matthew T. “Development of an experimental method to identify structural
properties of the intervertebral joint after spine staple
implantation under simulated physiologic loads.” 2011. Web. 18 Dec 2018.
Vancouver:
Coombs MT. Development of an experimental method to identify structural
properties of the intervertebral joint after spine staple
implantation under simulated physiologic loads. [Internet] [Masters thesis]. University of Cincinnati; 2011. [cited 2018 Dec 18].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1322052236.
Council of Science Editors:
Coombs MT. Development of an experimental method to identify structural
properties of the intervertebral joint after spine staple
implantation under simulated physiologic loads. [Masters Thesis]. University of Cincinnati; 2011. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1322052236
McMaster University
24.
Fewster, Kayla M.
AN INVESTIGATION OF LEANING BEHAVIOURS DURING ONE-HANDED SUBMAXIMAL EXERTIONS WITH EXTENDED REACHES.
Degree: MSc, 2013, McMaster University
URL: http://hdl.handle.net/11375/13434
► The purpose of this study was to investigate leaning behaviours when completing tasks with constrained reaches. A logistic regression was developed, with the input…
(more)
▼ The purpose of this study was to investigate leaning behaviours when completing tasks with constrained reaches. A logistic regression was developed, with the input of individual subject anthropometry and specific task characteristics, and the resulting model was able to provide a very accurate prediction of when an individual would lean. The inputs to this model give insight into what factors are important in the decision making process when a worker chooses whether lean. The task hand locations with the longest reaches resulted in the most frequent choice to lean. Leaning appears to be particularly common, and important, with long reaching and pulling tasks that can reduce task hand shoulder and trunk loads and improve balance, while allowing the worker to get closer to the task. Leaning hand forces were highest during pulling tasks. These findings are very important to document, as current ergonomic tools neglect to consider that different task characteristics may change how, and when, a worker leans. Even when only the direction of the task hand force was changed, leaning hand forces differed significantly. In this study, leaning hand height was slightly higher for the shoulder height, when compared to the umbilical height, task hand locations. The average height of the leaning hand did not vary considerably and ranged between 106.6cm to 116.3cm, depending on the condition. The leaning hand force magnitude changed as task hand location, force direction and force level changed. Leaning hand forces increased with increasing task hand load. Task hand forces in the push direction were higher compared to push and down exertions, regardless of task hand location or task hand load. The findings from this study are of particular use to industry as ergonomists now have representative forces and heights, to help guide leaning estimates during proactive risk assessments.
Master of Science (MSc)
Advisors/Committee Members: Potvin, Jim, Kinesiology.
Subjects/Keywords: Leaning; Ergonomics; Biomechanics; Constrained Reaching; Biomechanics; Biomechanics
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Manager
APA (6th Edition):
Fewster, K. M. (2013). AN INVESTIGATION OF LEANING BEHAVIOURS DURING ONE-HANDED SUBMAXIMAL EXERTIONS WITH EXTENDED REACHES. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/13434
Chicago Manual of Style (16th Edition):
Fewster, Kayla M. “AN INVESTIGATION OF LEANING BEHAVIOURS DURING ONE-HANDED SUBMAXIMAL EXERTIONS WITH EXTENDED REACHES.” 2013. Masters Thesis, McMaster University. Accessed December 18, 2018.
http://hdl.handle.net/11375/13434.
MLA Handbook (7th Edition):
Fewster, Kayla M. “AN INVESTIGATION OF LEANING BEHAVIOURS DURING ONE-HANDED SUBMAXIMAL EXERTIONS WITH EXTENDED REACHES.” 2013. Web. 18 Dec 2018.
Vancouver:
Fewster KM. AN INVESTIGATION OF LEANING BEHAVIOURS DURING ONE-HANDED SUBMAXIMAL EXERTIONS WITH EXTENDED REACHES. [Internet] [Masters thesis]. McMaster University; 2013. [cited 2018 Dec 18].
Available from: http://hdl.handle.net/11375/13434.
Council of Science Editors:
Fewster KM. AN INVESTIGATION OF LEANING BEHAVIOURS DURING ONE-HANDED SUBMAXIMAL EXERTIONS WITH EXTENDED REACHES. [Masters Thesis]. McMaster University; 2013. Available from: http://hdl.handle.net/11375/13434
Iowa State University
25.
Desimone, Katherine Meade.
Biomechanical Analysis of the Transition from Cycling to Running for Triathletes.
Degree: 2016, Iowa State University
URL: https://lib.dr.iastate.edu/etd/15690
► Background: Injury rates among triathletes have been reported to be as high as 87%. Previous research has established that some triathletes display altered kinematics during…
(more)
▼ Background: Injury rates among triathletes have been reported to be as high as 87%. Previous research has established that some triathletes display altered kinematics during running after cycling, compared to an isolated run. These kinematic changes include increased anterior pelvic tilt, decreased hip extension, and increased variability in stride length and time. The purpose of this study was to determine whether a hip flexor stretch performed in the brief transition period between cycling and running would result in a post-cycling (transition) run more similar to a control run.
Methods: Twelve participants performed a 5-minute baseline run, a 15-minute transition run with no intervention, and a 15-minute transition run with a bilateral hip flexor stretch between the cycling and running periods. Kinematic data were collected with a Vicon motion capture system. Segment angles, joint angles and stride lengths were calculated at a single time point in the baseline run and at 3 time points in each of the transition runs.
Results: Peak forward trunk lean, peak anterior pelvic tilt, peak hip extension, and peak hip flexion were significantly dependent upon run condition. Trunk lean and pelvic tilt significantly increased at all time points in both the no-stretch and stretch transition runs compared to baseline. Hip extension increased in the first minute of the stretch transition run, while hip flexion decreased in the first minute of the no-stretch transition run and in the 1 and 5-minute time points in the stretch transition run compared to baseline. Forward trunk lean and anterior pelvic tilt were lower in the stretch transition run before the 10-minute time point compared to the no-stretch transition run, though these differences were not significant.
Conclusion: An intervening hip flexor stretch provided only a modest and non-significant improvement in anterior pelvic tilt and forward trunk lean in the early stages of post-cycling running. The sustained increases in anterior pelvic tilt and trunk lean suggest that hip flexor tightness is not the only factor driving kinematic changes during transition running. Further investigation is needed to determine the mechanisms of cycling’s effects on running biomechanics.
Subjects/Keywords: Biomechanics; Running; Triathlon; Biomechanics; Kinesiology
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APA (6th Edition):
Desimone, K. M. (2016). Biomechanical Analysis of the Transition from Cycling to Running for Triathletes. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/15690
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Desimone, Katherine Meade. “Biomechanical Analysis of the Transition from Cycling to Running for Triathletes.” 2016. Thesis, Iowa State University. Accessed December 18, 2018.
https://lib.dr.iastate.edu/etd/15690.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Desimone, Katherine Meade. “Biomechanical Analysis of the Transition from Cycling to Running for Triathletes.” 2016. Web. 18 Dec 2018.
Vancouver:
Desimone KM. Biomechanical Analysis of the Transition from Cycling to Running for Triathletes. [Internet] [Thesis]. Iowa State University; 2016. [cited 2018 Dec 18].
Available from: https://lib.dr.iastate.edu/etd/15690.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Desimone KM. Biomechanical Analysis of the Transition from Cycling to Running for Triathletes. [Thesis]. Iowa State University; 2016. Available from: https://lib.dr.iastate.edu/etd/15690
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
26.
Schutts, Kyle S.
Focus of attention influences on Olympic weightlifting kinematics.
Degree: 2016, California State University, Long Beach
URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10007419
► Recent motor control literature has demonstrated that using verbal cues to direct a performer’s attention externally (i.e. toward movement outcome) enhances motor skill performance.…
(more)
▼ Recent motor control literature has demonstrated that using verbal cues to direct a performer’s attention externally (i.e. toward movement outcome) enhances motor skill performance. The purpose of this study was to investigate how an athlete’s focus of attention impacts kinematic performance of the snatch. 12 competitively trained athletes performed blocks of 3 snatch repetitions at 80% 1RM following internal and external instructions. The results indicated that athletes adopting an internal focus increased elbow velocity relative to an external, while an external focus increased horizontal barbell velocity. Internal cues resulted in larger BCH angles at the max height (MH), relative to external, indicating that the athletes are squatting under the barbell too soon. This information adds to the literature suggesting small changes in coaching cues can impact performance significantly. It is recommended that coaches use cues that direct an athlete’s attention externally, toward the movement outcome, rather than the action itself.
Subjects/Keywords: Kinesiology; Biomechanics
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APA (6th Edition):
Schutts, K. S. (2016). Focus of attention influences on Olympic weightlifting kinematics. (Thesis). California State University, Long Beach. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10007419
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Schutts, Kyle S. “Focus of attention influences on Olympic weightlifting kinematics.” 2016. Thesis, California State University, Long Beach. Accessed December 18, 2018.
http://pqdtopen.proquest.com/#viewpdf?dispub=10007419.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Schutts, Kyle S. “Focus of attention influences on Olympic weightlifting kinematics.” 2016. Web. 18 Dec 2018.
Vancouver:
Schutts KS. Focus of attention influences on Olympic weightlifting kinematics. [Internet] [Thesis]. California State University, Long Beach; 2016. [cited 2018 Dec 18].
Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10007419.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Schutts KS. Focus of attention influences on Olympic weightlifting kinematics. [Thesis]. California State University, Long Beach; 2016. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10007419
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California, Irvine
27.
Shreim, Samir Ghassan.
Manipulation and Optical Interrogation of the Cell Micromechanical Environment.
Degree: 2011, University of California, Irvine
URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3487071
► Micromechanical environmental factors have significant impact on the determination of cell fate. Fluid coupled and extracellular matrix forces trigger intra- and intercellular signaling cascades…
(more)
▼ Micromechanical environmental factors have significant impact on the determination of cell fate. Fluid coupled and extracellular matrix forces trigger intra- and intercellular signaling cascades critical in development, homeostasis, and disease. Microrheology is a set of tools designed to directly interrogate the micromechanical environment. Optical micromanipulation techniques offer exquisite sensitivity and high bandwidth. Oscillatory passive measures relate the Brownian motion of embedded probe particles to local complex shear modulus of viscoelastic materials. Active measures allow for the application of greater forces to actively engage the material in question. Rotational techniques provide measures of materials under flow. Herein we describe the development of an optomechanical platform for studying peri- and extracellular micromechanics. The endothelial glycocalyx layer is a complex 2 µm pericellular matrix expressed on the luminal surface of vascular endothelial cells that is thought to play critical roles in mechanotransduction and hemodynamics. Direct measures of glycocalyx material properties have been elusive. We describe passive, active, and rotational microrheology of glycocalyx mimetics to uncover micromechanical subtleties in hyaluronic acid, a primary glycocalyx constituent. Passive microrheology demonstrates the potential for transient network formation and the importance of hydrodynamic effects in hyaluronic acid solutions of physiologically relevant molecular weights and concentration. Active microrheology diverges from passive measures at frequencies above the inverse material relaxation time. Importantly, this divergence occurs at physiologic time scales. In contrast to oscillatory measures, rotational microrheology reports linear viscous behavior in glycocalyx mimetics under flow. This intrinsic micromechanical behavior of hyaluronic acid solutions may be critical in the determination of glycocalyx material properties. We develop a novel combinatorial approach to rotational microrheology allowing measurements in ‘thick’ biologically relevant samples. This technique is validated and used to map the viscosity as a function of radial distance from the endothelial cell membrane in excised porcine femoral artery. Viscosity is modulated at up to 6 µm from the endothelial cell membrane, well beyond the expected physical extent of the glycocalyx. This effect occurs at distances on the order of capillary diameters and may have profound hemodynamic consequences. Further implications with respect to glycocalyx material properties are discussed. Extracellular matrix stiffness is thought to be a profound regulator of cell fate. Bulk measures of matrix stiffness correlate well with cell phenotype and gene expression changes. State of the art techniques for tuning matrix stiffness rely on increasing protein concentration or the addition of exogenous crosslinkers, which successfully tune macroscale mechanics. However, these approaches…
Subjects/Keywords: Biophysics; Biomechanics
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APA ·
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MLA ·
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APA (6th Edition):
Shreim, S. G. (2011). Manipulation and Optical Interrogation of the Cell Micromechanical Environment. (Thesis). University of California, Irvine. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3487071
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shreim, Samir Ghassan. “Manipulation and Optical Interrogation of the Cell Micromechanical Environment.” 2011. Thesis, University of California, Irvine. Accessed December 18, 2018.
http://pqdtopen.proquest.com/#viewpdf?dispub=3487071.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shreim, Samir Ghassan. “Manipulation and Optical Interrogation of the Cell Micromechanical Environment.” 2011. Web. 18 Dec 2018.
Vancouver:
Shreim SG. Manipulation and Optical Interrogation of the Cell Micromechanical Environment. [Internet] [Thesis]. University of California, Irvine; 2011. [cited 2018 Dec 18].
Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3487071.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shreim SG. Manipulation and Optical Interrogation of the Cell Micromechanical Environment. [Thesis]. University of California, Irvine; 2011. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3487071
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Delaware
28.
Zhou, Xiaozhou.
Modeling solute transport in loaded bone.
Degree: 2012, University of Delaware
URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3499883
► In response to mechanical stimulus, osteocytes release various signaling molecules that regulate other bone cells during bone modeling and remodeling. Solute transport through LCS…
(more)
▼ In response to mechanical stimulus, osteocytes release various signaling molecules that regulate other bone cells during bone modeling and remodeling. Solute transport through LCS is thus essential for osteocytes not only to perform their regulatory functions but also to maintain their viability. However, the solute transport in the LCS of loaded bone has not been well understood due to technique challenges. In this dissertation, I have developed mathematical models at multiple levels to simulate fluorescence recovery after photobleaching (FRAP) experiments, and to obtain new data and knowledge regarding the microenvironments of osteocytes. At the cellular-level, I developed a three-compartment model to numerically solve the diffusion-convection equation for a typical FRAP experiment. I found that fluorescence recovery during FRAP experiments in a dynamically loaded bone is characterized by an exponential process <i>e-kt</i>, where the transport rate <i>k</i> increases with higher loading magnitude and lower frequency. Mechanical load is predicted to enhance transport of all tracers relative to diffusion, with the greatest enhancement for medium-sized tracers. The large tracers have high reflection coefficients through the pericellular matrix (PCM) that reduce the convective effect. The reflection coefficient which represents the resistance of PCM on the solute flux was then analytically formulated with a 3D orthogonal fiber network model, and found to increase with increasing fiber volume fraction and decreasing fiber radius. By applying these multiple-level models to our FRAP experiments, the peak fluid velocity in a mouse tibia under intermittent compressive load with peak magnitude at 3 N, resting period at 4 s and loading period at 2 s was quantified as ∼60 μm/s, the reflection coefficient of parvalbumin was quantified as 0.092, and the fiber volume fraction in the PCM was estimated as 2.1–17.2% depending on fiber radius varied from 1 nm to 3 nm. The work described in this dissertation forms a solid foundation for future studies on solute transport and molecular signaling around osteocytes, especially in disease conditions where the LCS anatomy and/or PCM are altered. These investigations will transform our understanding of bone health and pathology and help develop efficient treatments or countermeasures of bone diseases and conditions.
Subjects/Keywords: Biophysics; Biomechanics
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APA ·
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MLA ·
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APA (6th Edition):
Zhou, X. (2012). Modeling solute transport in loaded bone. (Thesis). University of Delaware. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3499883
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhou, Xiaozhou. “Modeling solute transport in loaded bone.” 2012. Thesis, University of Delaware. Accessed December 18, 2018.
http://pqdtopen.proquest.com/#viewpdf?dispub=3499883.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhou, Xiaozhou. “Modeling solute transport in loaded bone.” 2012. Web. 18 Dec 2018.
Vancouver:
Zhou X. Modeling solute transport in loaded bone. [Internet] [Thesis]. University of Delaware; 2012. [cited 2018 Dec 18].
Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3499883.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhou X. Modeling solute transport in loaded bone. [Thesis]. University of Delaware; 2012. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3499883
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
The University of Utah
29.
Greenland, Kasey O.
Effects of elevated vacuum socket suspension and vacuum level on unilateral trans-tibial amputee gait.
Degree: 2012, The University of Utah
URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3502337
► Elevated vacuum socket suspensions are regularly used by trans-tibial amputees to secure the prostheses to the residual limb via externally applied vacuum. This suspension…
(more)
▼ Elevated vacuum socket suspensions are regularly used by trans-tibial amputees to secure the prostheses to the residual limb via externally applied vacuum. This suspension system has demonstrated unique health benefits for the limb and improved gait symmetry. Published research on elevated vacuum socket suspension principally examines patient outcomes and pressure measurements. Aims of this dissertation were to investigate the effects of vacuum levels on various gait parameters. Three stand-alone papers describe (1) temporal and kinematic effects of vacuum levels, (2) kinetics and ground reaction force effects of vacuum levels and (3) amputee gait with the elevated vacuum socket suspension relative to able-bodied gait. Nine male unilateral trans-tibial amputees with elevated vacuum socket suspension and nine able-bodied subjects participated in the study. Three-dimensional motion data were captured using a video camera and force plate system in conjunction with a reflective marker set. Able-bodied subjects walked at self-preferred walking speeds. Amputees walked at self-preferred walking speeds with typical vacuum levels for the first set of trials. Subsequent sets of trials were at a controlled walking speed with five randomized vacuum levels ranging from 0–20 inches Hg. Comfort level improved with increasing vacuum (<i>p</i>=0.001). Step time asymmetry (<i>p</i>=0.035) and knee adduction moment (<i> p</i><0.05) values increased with vacuum. Several ground reaction force parameters had significant limb by vacuum interaction effects (<i> p</i><0.05). Limb effects typically had larger overall effect sizes than vacuum level and interaction effects. Intact limbs had greater values than residual limbs for stance phase duration (<i>p</i>=0.019), single support duration (<i>p</i>=0.008), step length (<i> p</i>=0.005), walking speed (<i>p</i><0.05), hip adduction moments (<i>p</i><0.05), various ground reaction force parameters (<i>p</i><0.05) and ankle joint power (<i>p</i><0.001). Conversely, residual limbs had higher values for maximum lateral trunk obliquity (<i>p</i>=0.009) and hip and knee joint power impulses (<i> p</i><0.05). Control subjects had shorter double support phase (<i> p</i><0.05) than amputee subjects. The intact limb of the amputee had a larger burden than the residual limb. Absence of plantar flexors in the residual limb induces between-limb differences and compensation mechanisms. At higher levels of vacuum amputees utilized the residual limb to a greater extent for some parameters, possibly due to increased socket comfort.
Subjects/Keywords: Biophysics; Biomechanics
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APA ·
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CSE |
Export
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APA (6th Edition):
Greenland, K. O. (2012). Effects of elevated vacuum socket suspension and vacuum level on unilateral trans-tibial amputee gait. (Thesis). The University of Utah. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3502337
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Greenland, Kasey O. “Effects of elevated vacuum socket suspension and vacuum level on unilateral trans-tibial amputee gait.” 2012. Thesis, The University of Utah. Accessed December 18, 2018.
http://pqdtopen.proquest.com/#viewpdf?dispub=3502337.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Greenland, Kasey O. “Effects of elevated vacuum socket suspension and vacuum level on unilateral trans-tibial amputee gait.” 2012. Web. 18 Dec 2018.
Vancouver:
Greenland KO. Effects of elevated vacuum socket suspension and vacuum level on unilateral trans-tibial amputee gait. [Internet] [Thesis]. The University of Utah; 2012. [cited 2018 Dec 18].
Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3502337.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Greenland KO. Effects of elevated vacuum socket suspension and vacuum level on unilateral trans-tibial amputee gait. [Thesis]. The University of Utah; 2012. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3502337
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Delaware
30.
Boynton, Angela C.
Mechanical and muscular determinants of metabolic cost during hand carriage of load.
Degree: 2012, University of Delaware
URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3540673
► <b>Background:</b> Dismounted Soldiers routinely carry substantial loads over long distances at a fixed cadence. While much of the load is carried on the trunk,…
(more)
▼ <b>Background:</b> Dismounted Soldiers routinely carry substantial loads over long distances at a fixed cadence. While much of the load is carried on the trunk, Soldiers typically carry a weapon in their hands and will likely bear additional loads on their arms in the future (e.g. communication devices, body armor). The physiologic demand of carrying load on the extremities is considerably higher than carrying the same load close to the body, but the changes in gait mechanics and muscle activity associated with this increase are not well understood. <b>Purpose:</b> The purpose of this study was to develop a better understanding of the changes in gait mechanics and muscle activity related to the disproportionate increase in metabolic cost associated with carrying load in the hands. This was accomplished by 1) quantifying the effects of hand carriage of load on mechanics, energetics and muscle activity, 2) evaluating the relationships between changes in mechanical and muscular variables and increases in metabolic cost during walking, and 3) investigating the effects of changes in stride frequency on gait mechanics, energetics and muscle activity during hand carriage of load. <b>Methods:</b> Motion capture, oxygen consumption and muscle activity data were obtained from 30 subjects walking on a treadmill at 3 mph under various combinations of load magnitude, load location and arm swing at a specific stride frequency. Spatiotemporal parameters, kinematics, coordination between trunk and pelvis rotation, metabolic rate, and muscle activity levels were evaluated for each load carriage condition. <b> Results:</b> Hand carrying load in front of the body using both hands is associated with significant changes in gait mechanics, muscle activity and metabolic cost. Changes in metabolic cost during walking with small trunk-borne or hand carried loads appear to primarily depend on transverse plane trunk and pelvis kinematics and anterioposterior position of the center of mass. Individuals are able to maintain a stable gait pattern with changes in stride frequency, even when hand carrying a load in front of the trunk. <b>Conclusion: </b> The significant biomechanical and physiologic changes associated with hand carrying a load in front of the trunk may lead to systemic and local muscle fatigue with negative consequences for Soldier task performance. Changes in gait mechanics and muscle activity associated with over striding may put individuals of shorter stature at an increased risk of fatigue. The results of these studies can aid mission planners in making better estimations of Soldier performance under different load carriage conditions and system developers in optimally designing manually carried Soldier equipment. Future studies are needed to quantify the fatigue due to biomechanical and physiologic changes associated with various modes of load carriage and evaluate its impact on Soldier performance.
Subjects/Keywords: Biophysics; Biomechanics
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Boynton, A. C. (2012). Mechanical and muscular determinants of metabolic cost during hand carriage of load. (Thesis). University of Delaware. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3540673
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Boynton, Angela C. “Mechanical and muscular determinants of metabolic cost during hand carriage of load.” 2012. Thesis, University of Delaware. Accessed December 18, 2018.
http://pqdtopen.proquest.com/#viewpdf?dispub=3540673.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Boynton, Angela C. “Mechanical and muscular determinants of metabolic cost during hand carriage of load.” 2012. Web. 18 Dec 2018.
Vancouver:
Boynton AC. Mechanical and muscular determinants of metabolic cost during hand carriage of load. [Internet] [Thesis]. University of Delaware; 2012. [cited 2018 Dec 18].
Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3540673.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Boynton AC. Mechanical and muscular determinants of metabolic cost during hand carriage of load. [Thesis]. University of Delaware; 2012. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3540673
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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