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A, general procedure. B, cognitive testing: the 5 cognitive tests were performed randomly within subjects (MTS, match to sample visual search; CRT, choice reaction time; PRM, pattern recognition memory; RVP, rapid visual information processing; SSP, spatial span). C, neuromuscular testing: thin arrows: stimulation at Hmax intensity; thick arrows: stimulation at Mmax intensity; black rectangles: maximal voluntary contraction (MVC).
