Figure 2. Determination of the width of the interaction window for PAS-induced depressant effects on MEP size (Expt 1).

Individual data (grey dots) and group mean data ± SEM (black bars) of the changes of the normalized MEP amplitudes following PAS with different interstimulus intervals adjusted to the individual N20 latency (adjISI = N20 latency – ISI, Expt 1). §Significant change from baseline. Inset, schematic illustration of the varying cortical arriving times of the afferent pulse reaching the primary motor cortex.