Exercise-induced Alteration in Brain Activity during Motor Performance under Cognitive Stress
Final rept. 15 Jun 2012-14 Mar 2013
GEORGIA TECH RESEARCH CORP ATLANTA
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The specific aim of the study was to examine the potential changes in the beta-band 15-30 Hz neural oscillations between brain and muscle during simple fine motor performance under stress after high-intensity physical exertion. Healthy young adults were assigned to the Experimental or Control groups. Steady low-level force matching task using the index finger was performed independently Single task and concurrently with a cognitive task Dual task for 3 time blocks. Between the 1st and 2nd time blocks, subjects in the Experimental group performed active leg resistance exercise. Oscillations in EEG and corticomuscular coherence in beta band both tended to decrease during the Dual task after resistance exercise. This observation suggested a possible role of resistance exercise for potentially reducing beta band neural oscillations during fine motor task under cognitive stress. There was a significant negative correlation between peak beta-band corticomuscular coherence and the coefficient of variation of EMG during the Dual task. Collectively, these results implied that reduction in beta-band corticomuscular coherence due to high-intensity physical exertion may lead to increased variability in motor output under cognitive stress.
- Anatomy and Physiology
- Medicine and Medical Research