Several studies have shown that learning a motor task with one hand can be transferred to the contralateral hand (37, 43, 45, 46, 47). Studies have demonstrated that learning a finger sequence task (Serial Reaction Time test, SRTT) with the dominant-hand (trained) can be transferred to the contralateral hand (un-trained) (43,49,50). In this additional experiment we propose to investigate the effect of disrupting M1 (by using 1 Hz TMS, inhibitory effect) on motor learning in the trained hand (dominant) and in the un-trained hand (non-dominant). Evidence has shown that there is transcallosal connections between M1 of both hemispheres (40). Since M1 is active during implicit learning (41, 42) we expect 1 Hz TMS stimulation (inhibitory effect) over M1 will deteriorate implicit learning in the trained hand (dominant) as well as in the un-trained hand (non-dominant). This will be evaluated by assessing their effect on reaction times and accuracy of motor performance in both hands.