Cognitive processes during self-paced motor performance: An electroencephalographic profile of skilled marksmen.

In the initial phase of the study (Study 1) electrocortical arousal (EEG alpha activity) was assessed at four standardized sites (T3, T4, 01, and 02) from male and female (N = 17) international-caliber marksmen during rifle shooting performance. The task consisted of the execution of 40 shots at a conventional indoor target from the standing position. During each shot preparation, a significant increase in left temporal and occipital alpha activity was demonstrated, while the right hemispheric activity remained constant. Hemispheric laterality ratios (T4:T3) evidenced a significant shift toward right-brain dominance as the time to trigger pull approached. In the second phase of the study (Study 2) male and female (N = 15) marksmen performed the same shooting task and, additionally, the resultant EEG performance patterns were contrasted to those observed during the mental processing of sterotyped left-brain and right-brain mental tasks. Observed EEG patterns, that is, temporal ratios, during shooting repli...

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