The Influence of Bihemispheric Transcranial Direct Current Stimulation on Muscle Fatigue
Year: 2024
Type: article
Abstract: Unilateral transcranial direct current stimulation (tDCS) using two electrodes placed over the primary motor cortex (M1) and the contralateral supraorbital (SO) region (M1-SO montage) has been shown to decrease the progression of muscle fatigue. The primary purpose was to determine the impact of bihemispheric tDCS (bi-tDCS) applied over the left and right M1s (bi-tDCS) on the time to task failure (TTF) of a precision-grip task. The study implemented a double-blind, randomized, SHAM-controlled, within-subjects design. A total of 20 participants performed two experimental sessions (bi-tDCS and SHAM conditions) separated by a one-week washout. During each experimental session, a fatiguing isometric contraction of the right hand was performed with a precision grip during concurrent application of either bi-tDCS or SHAM stimulation of the two M1s. The fatiguing contraction required participants to match a target force equal to 15% of their maximum voluntary contraction (MVC) force until TTF. The main findings were that there were no statistically significant differences in TTF (P = 0.730) and percentage decline in MVC force (P = 0.733) between the bi-tDCS and SHAM conditions. Furthermore, there were no significant differences in force error, standard deviation of force, or EMG activity between the two conditions. These results indicate that bi-tDCS does not delay the progression of fatigue during a precision grip task in healthy adults in the task conditions of the current study.
DOI: 10.34917/37650790
Author: Chauhan, Ananya
Language: English
Subfield: Neurology
Field: Neuroscience
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W6946877683
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