The contribution of supplementary motor area to the performance of ballistic joystick movements on 11 right-handed normal volunteers were examined by means of transcranial magnetic stimulation (TMS). The volunteers moved a joystick with the right hand triggered by a visual go-signal. Four directions were possible: left, right, forwards, backwards. 50, 100, 150 ms after the go-signal, three biphasic magnetic pulses were applied to the SMA (verum) or mesial frontal cortex (sham-TMS). The stimulus intensity was set at the motor threshold of the right anterior tibial muscle. Compared to sham-TMS, TMS applied to the SMA caused a consistent decrease in movement time of internally cued ballisitc joystick movements. Our results give further evidence that the SMA plays an important part by the fast performance of internally cued ballistic hand movments.
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The contribution of supplementary motor area to the performance of ballistic joystick movements on 11 right-handed normal volunteers were examined by means of transcranial magnetic stimulation (TMS). The volunteers moved a joystick with the right hand triggered by a visual go-signal. Four directions were possible: left, right, forwards, backwards. 50, 100, 150 ms after the go-signal, three biphasic magnetic pulses were applied to the SMA (verum) or mesial frontal cortex (sham-TMS). The stimulus...
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