Award Date
5-1-2024
Degree Type
Thesis
Degree Name
Master of Science (MS)
Department
Kinesiology and Nutrition Sciences
First Committee Member
Brach Poston
Second Committee Member
Richard Tandy
Third Committee Member
Sharon Jalene
Fourth Committee Member
Mark Guadagnoli
Number of Pages
41
Abstract
Transcranial direct current stimulation (tDCS) applied unilaterally to the primary motor cortex (M1) can significantly prolong the time to task failure (TTF) of a fatiguing contraction. The primary purpose of the study was to examine the influence of bilateral dual source tDCS (dstDCS) applied over the left and right M1s (ds-tDCS) on the TTF of a precision grip task. This was accomplished through the utilization of a double-blind, randomized, SHAM-controlled, within-subjects design. Fourteen participants completed two experiments (ds-tDCS and SHAM stimulation conditions) with a seven-day washout period between sessions. Each experiment involved the performance of a sustained isometric fatiguing contraction using a precision grip (index finger and thumb) of the right hand while either ds-tDCS or SHAM stimulation was applied to the left and right M1 by two separate stimulation devices. Participants were directed to match a target force equivalent to 15% of the maximum voluntary contraction (MVC) force for as long as possible (TTF). The main findings were that both the TTF and the percentage decline in MVC force were not significantly different between the ds-tDCS and SHAM stimulation conditions. In addition, the force error, standard deviation (SD) of force, and EMG activity was not significantly different between the ds-tDCS and SHAM stimulation conditions. These findings suggest that ds-tDCS does not reduce the rate of progression of muscle fatigue in a sustained submaximal isometric contraction of hand muscles.
Controlled Subject
Kinesiology; Magnetic brain stimulation; Grip strength
Disciplines
Medical Neurobiology | Medicine and Health Sciences | Neuroscience and Neurobiology | Neurosciences
File Format
File Size
564 KB
Degree Grantor
University of Nevada, Las Vegas
Language
English
Repository Citation
Clinton, Eliza, "The Influence of Bilateral Dual Source Transcranial Direct Current Stimulation on the Progression of Muscle Fatigue" (2024). UNLV Theses, Dissertations, Professional Papers, and Capstones. 4976.
http://dx.doi.org/10.34917/37650798
Rights
IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/
Included in
Medical Neurobiology Commons, Neuroscience and Neurobiology Commons, Neurosciences Commons