Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

You searched for subject:(prolonged speech). One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


University of Vermont

1. Kazenski, Danra M. FNIRS Measures of Prefrontal Cortex Lateralization During Stuttered and Fluency-Enhanced Speech in Adults Who Stutter.

Degree: PhD, Psychology, 2015, University of Vermont

The present study compared lateralization of cortical activation patterns in the prefrontal cortex (PFC) of adults who stutter (AWS) and typical speakers (TS) as measured with functional near infrared spectroscopy (fNIRS) in habitual and fluency-enhanced speaking conditions. Participants were AWS (n = 11) and gender- and age-matched TS (n = 11) who completed speaking tasks in three condition blocks: (1) habitual speech using no speaking strategy (2) prolonged speech after receiving short-term training in fluency-shaping strategy-use (3) syllable-timed speech after being trained to speak in rhythm with a metronome at 92 beats per minute. The three primary dependent variables were mean change in HbO (oxygenation) relative to resting baseline in the right and left PFC hemispheres and a Laterality Index (L-R)/(L+R) calculated from these values. Two primary hypotheses were tested: (1) AWS will present with greater right-hemisphere PFC oxygenation relative to TS in a habitual or everyday speaking task (2) AWS will present with reduced right-hemisphere PFC activation (leftward shift in laterality more similar to TS) during fluency-enhanced speech strategy tasks relative to a habitual speech task. Real-time stuttered speech measures using fNIRS indicated greater effortfulness of speech production in AWS when speaking fluently and disfluently as measured by greater bilateral change in PFC HbO relative to TS. AWS laterality did not differ from TS during everyday conversation and did not significantly change when using fluency-enhancing strategies, which was counter to the hypotheses. The TS group presented with significantly greater leftward PFC HbO in the metronome condition compared to AWS. Prolonged speech and metronome-timed speech seem to be associated with different activation patterns in the PFC for AWS and for TS. Results suggest an alternative explanation for compensatory activation in AWS during speech production, such that AWS present with greater overall activation in both PFC hemispheres relative to TS which results in greater right-sided laterality than TS. Future long-term studies on adults receiving prolonged speech treatment and examination of similar measures in young children who stutter may reveal more about the compensatory versus causal nature of stuttering. Advisors/Committee Members: Barry E. Guitar, Michael Cannizzaro.

Subjects/Keywords: fNIRS; laterality; metronome; prefrontal cortex; prolonged speech; stuttering; Communication; Communication Sciences and Disorders; Psychology

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Kazenski, D. M. (2015). FNIRS Measures of Prefrontal Cortex Lateralization During Stuttered and Fluency-Enhanced Speech in Adults Who Stutter. (Doctoral Dissertation). University of Vermont. Retrieved from https://scholarworks.uvm.edu/graddis/303

Chicago Manual of Style (16th Edition):

Kazenski, Danra M. “FNIRS Measures of Prefrontal Cortex Lateralization During Stuttered and Fluency-Enhanced Speech in Adults Who Stutter.” 2015. Doctoral Dissertation, University of Vermont. Accessed January 17, 2021. https://scholarworks.uvm.edu/graddis/303.

MLA Handbook (7th Edition):

Kazenski, Danra M. “FNIRS Measures of Prefrontal Cortex Lateralization During Stuttered and Fluency-Enhanced Speech in Adults Who Stutter.” 2015. Web. 17 Jan 2021.

Vancouver:

Kazenski DM. FNIRS Measures of Prefrontal Cortex Lateralization During Stuttered and Fluency-Enhanced Speech in Adults Who Stutter. [Internet] [Doctoral dissertation]. University of Vermont; 2015. [cited 2021 Jan 17]. Available from: https://scholarworks.uvm.edu/graddis/303.

Council of Science Editors:

Kazenski DM. FNIRS Measures of Prefrontal Cortex Lateralization During Stuttered and Fluency-Enhanced Speech in Adults Who Stutter. [Doctoral Dissertation]. University of Vermont; 2015. Available from: https://scholarworks.uvm.edu/graddis/303

.