Award Date
May 2024
Degree Type
Thesis
Degree Name
Master of Science (MS)
Department
Kinesiology and Nutrition Sciences
First Committee Member
Brach Poston
Second Committee Member
James Navalta
Third Committee Member
Sharon Jalene
Fourth Committee Member
Mark Guadagnoli
Number of Pages
39
Abstract
Transcranial direct current stimulation (tDCS) delivered to the dorsolateral prefrontal cortex (DLPFC) can increase endurance time in lower body cycling tasks. The purpose was to examine the effect of DLPFC-tDCS on the time to task failure (TTF) of a fatiguing contraction performed by hand muscles. The study used a double-blind, randomized, SHAM-controlled, crossover design. Participants completed two experimental sessions on separate days with a washout between sessions. All facets of the experiments were identical except the stimulation condition (DLPFC-tDCS or SHAM) that was given concurrent with the fatiguing contraction. The fatiguing contraction involved gripping a manipulandum with the index finger and thumb using a precision grip and matching an isometric target equal to 15% of the maximum voluntary contraction (MVC) for as long as possible until task failure. The main findings were that TTF and fatigue index did not differ between the DLPFC-tDCS and SHAM conditions. Furthermore, there was no significant differences during the fatiguing contractions in the rates of increase of electromyographic (EMG), force error, or standard deviation (SD) of force between the DLPFC-tDCS and SHAM conditions. Overall, the results indicate that application of DLPFC-tDCS does not reduce the rate of muscle fatigue development in the current task conditions.
Disciplines
Kinesiology
Degree Grantor
University of Nevada, Las Vegas
Language
English
Repository Citation
Liddell, Taylie Thompson, "The Effect of Transcranial Direct Current Stimulation of the Dorsolateral Prefrontal Cortex on Muscle Fatigue Resistance" (2024). UNLV Theses, Dissertations, Professional Papers, and Capstones. 5028.
http://dx.doi.org/10.34917/37650852
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