Paired Associative Stimulation in Stroke

"Paired associative stimulation (PAS) is a new technique where one pairs a peripheral stimulation with centrally applied transcranial magnetic stimulation (TMS), and produces plasticity, as measured by TMS MEP's. Currently PAS is performed with median nerve stimulation.~PA25: The interval between median nerve stimulation and TMS was chosen to be 25 ms, which is called PAS25. 240 paired TMS and median nerve stimulation at a frequency of 0.2 Hz over 20 min.~PAS10: 240 paired TMS and median nerve stimulation with interval of 10 min second at a frequency of 0.2 Hz over 20 min.~PAS100: 240 paired TMS and median nerve stimulation with interval of 100 min second at a frequency of 0.2 Hz over 20 min."