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Title Dynamic Simulation and Neuromuscular Control of Movement: Applications for Predictive Simulations of Balance Recovery
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Publication Date
Degree Level doctoral
University/Publisher University of Tennessee – Knoxville
Abstract Balance is among the most challenging tasks for patients with movement disorders. Study and treatment of these disorders could greatly benefit from combined software tools that offer better insights into neuromuscular biomechanics, and predictive capabilities for optimal surgical and rehabilitation treatment planning. A platform was created to combine musculoskeletal modeling, closed-loop forward dynamic simulation, optimization techniques, and neuromuscular control system design. Spinal (stretch-reflex) and supraspinal (operational space task-based) controllers were developed to test simulation-based hypotheses related to balance recovery and movement control. A corrective procedure (rectus femoris transfer surgery) was targeted for children experiencing stiff-knee gait and how this procedure may affect their balance recovery. Clinical movement analysis and simulation-based approaches were combined to understand the biomechanical consequences of this surgical procedure. The closed-loop controller was extended by merging approaches from robotics and biomechanics. A prioritized multi-task, support-consistent, task-based controller was implemented inside the simulation platform to synthesize human balance. The simulated results were validated with experimental data of healthy adults by defining surrogate response surfaces that represent the patients’ primary tasks (e.g., to keep their balance) as function of defined subtasks (e.g. swing leg positions or torso orientations). The potential of using this platform to study, predict functional outcomes and perhaps improve treatments for musculoskeletal conditions is exciting and valuable. This project not only integrates software tools, but also allows integration of neuroscientists, physiologists, biomechanists, and physical therapists to adopt, adapt, and generate new solutions for musculoskeletal conditions.
Subjects/Keywords Dynamic Simulation of human movement; Neuromuscular control; Rectus Femoris Transfer surgery in children with cerebral palsy; balance recovery simulations; predictive simulation of movement; synthesizing human balance; Biomechanical Engineering; Controls and Control Theory; Dynamics and Dynamical Systems; Movement and Mind-Body Therapies; Rehabilitation and Therapy; Robotics; Surgical Procedures, Operative
Country of Publication us
Format application/pdf
Record ID oai:trace.tennessee.edu:utk_graddiss-4696
Repository utk-diss
Date Retrieved
Date Indexed 2019-01-07

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…39 CHAPTER 4 INFLUENCE OF THE BIARTICULAR RECTUS FEMORIS MUSCLE ON BALANCE RECOVERY IN CHILDREN WITH CEREBRAL PALSY ............................. 41 4.1. Introduction…

…and control pipeline to investigate the role of rectus femoris muscle in balance recovery in children with cerebral palsy. Stiff knee gait is a prevalent and troublesome movement disorder among children with cerebral palsy (CP), whereby peak…

…optimization techniques, and neuromuscular control system design to investigate the role of the rectus femoris muscle on balance recovery following supportsurface translations in children with CP following rectus femoris transfer surgery. We hypothesized that…

CHILDREN WITH MILD AND MODERATE CROUCH TO TEST OUR HYPOTHESIS REGARDING BALANCE RECOVERY FOLLOWING RECTUS FEMORIS TRANSFER SURGERY. BIARTICULAR LOCATIONS FOR THE RECTUS FEMORIS MUSCLE ARE SHOWN AS (A) THE PRE-SURGICAL ATTACHMENT TO PATELLA AND…

…achieve this aim, we: 1) Created patient specific musculoskeletal models of children with spastic CP before and after rectus femoris transfer surgery adopting either a mild or moderate crouched posture; 2) Designed a biologically-inspired, closed…

…such as children with cerebral palsy [68-70]. Using the platform, we hope to develop scientific guidelines for understanding and improving balance recovery in patients with neuromuscular disorders. Stiff-knee gait is a troublesome…

…neuromuscular disorder among children with cerebral palsy. Patients experiencing stiff-knee gait typically adopt energy-inefficient movements due to over-activity of lower extremity muscles and are prone to falling and tripping. Currently, corrective procedures…

…knee flexion is diminished during the swing phase of gait due to over-activity of lower extremity muscles such as Rectus Femoris. Rectus femoris transfer surgery, a common treatment for stiffknee gait, reattaches the distal tendon of this muscle from…

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