Figure 1
From: Effects of brain polarization on reaction times and pinch force in chronic stroke
(A) Effects of tDCS on RT (representative trials). RT, measured as the time between the GO-signal and the onset of EMG response, is shown at baseline (RTBase) and post intervention (RTPost) in representative trials in the tDCS (left) and Sham (right) sessions. Note the shorter RTPost than RTBase after tDCS but not Sham (highlighted in gray). X axis shows time (msec) and Y axis shows EMG activity (mV) (B) Effects of tDCS on RT (individual subjects) RT after tDCS and Sham relative to baseline (BASE) in all subjects (values > 100 indicate longer RT, whereas those < 100 indicate faster RT relative to baseline). Note that RT improved in all subjects with tDCS, while most subjects experienced longer RT with Sham, probably reflecting mild fatigue over the length of the experimental session (see Discussion). Group analysis showed that RT improvements were significantly different from Sham (paired t-test, p < 0.05), an effect present in all subjects (see individual subject connecting lines). (C) Effects of tDCS on RT (group data) tDCS shortened significantly RT (RTBase, paired t-test, p < 0.05). Y axis shows reaction times in msec.