Figure 2
From: Effects of methylphenidate on motor system excitability in a response inhibition task
Illustration of the go/nogo task (S1-S2 paradigm). The go/nogo task consisted of control, go-left, nogo-left, go-right and nogo-right trials. TMS stimuli (single pulses or double pulses with an interstimulus interval of 3 ms) were presented either at 120 ms, 230 ms or 350 ms after the onset of the S2 stimulus. The EMG traces, which were recorded during control trials, contain the TMS stimulus artefacts and the motor evoked potentials (MEP) elicited by the TMS stimulus.