None of the subjects reported undesired effects of TMS in both the experiments. Since in trials considered for the analysis TMS was delivered in the pre-movement or early phase of movement, trials in which subjects were particularly fast and TMS arrived after the response phase (i.e. when the movement was already concluded) were excluded from the accuracy analysis. Trials excluded were 7.15% of the total trials of the Experiment 1 and 6.1% of the Experiment 2. Considering the SHAM condition, a fairly good accuracy in NO-STOP trials (70% overall) and a low error rate in the STOP trials (22% overall) indicate good balance between a demanding task, requiring subjects to be focused and presumably putting themselves in a specific state in order to accomplish the task, and an acceptable compliance of the participants.

The mean of stimulation intensity was 59% of the stimulator output (range 46%-77%, SD 9.5). Reaction times in the SHAM condition (NO-STOP trials) were on average 617 ms, ranging across 213-1036 ms. In the REAL condition (NO-STOP trials) were on average 614 ms, ranging across 218-1046 ms.

The mean of stimulation intensity was 78% of the stimulator output (range 60%-90% SD=10.5). Reaction times in the SHAM condition (NO-STOP trials) were on average 624 ms, ranging across 321-1039 ms. In the REAL condition (NO-STOP trials) were on average 601 ms, ranging across 330-1037 ms.

Results