Figure 6: Continuous mMEPs monitoring during lesionectomy in the precentral gyrus. The stimulation is done via one contact of a subdural strip (anode) and a sterile needle electrode placed at the margin of the surgical field (cathode). Noticed polyphasic mMEPs triggered in the hand and brachioradialis-triceps channels. The stimulation is done with repetitive trains at 2 Hz; 6 pulses/trains, pulse width 0.5 msec and pulses’ frequency within each train at 250 Hz.