6 Month Follow up Study on the Changes of Postural Stability in Parkinsonian Patients in Response to High Frequency TMS.

The High Frequency repetitive TMS will be delivered to the scalp over the primary motor cortex contralateral to the more affected side using a MAGSTIM rapid2 machine (Model P/N 3576-23-09, MAGSTIM Company LTD, UK) connected with a figure - of- eight shaped coil. Each patient will receive 12 sessions over four weeks. Position of the coil will be adjusted to find the optimal scalp position and the location of stimulation that will be marked to maintain consistency among sessions. The session will consist of 24 trains of 50 stimuli each delivered at five Hz. The procedure will be conducted with the patients in the ''On'' state (75 min. after medications)