P226 The effect of interstimulus interval between the conditioning and test stimulus on inhibition and fascilitation: A transcranial magnetic stimulation study

Transcranial magnetic stimulation (TMS) technique creates small and temporary electrical current on cerebral cortex via a strong magnetic field. Previous studies investigating the cortical excitability using paired pulse stimulation technique have implemented a suprathreshold test stimulus (TS) conditioned by subthreshold stimulus (CS). If interstimulus interval (ISI) between CS and TS is 1–6ms, motor evoked potential (MEP) amplitude will decrease and it is called short interval intracortical inhibition (SICI).

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