Electromyography
Surface EMG (Ag–AgCl, Noraxon dual electrodes, interelectrode distance 2.0 cm) was used to record motor evoked potentials (MEPs) following TMS over the biceps femoris corticomotor representation. The active electrode was placed over the belly of the right biceps femoris muscle, and the ground electrode was positioned over the anterior superior iliac spine. EMG signals were amplified (×1000), bandpass filtered (20–1000 Hz), and sampled at 2 kHz using a Power 1401 Data Acquisition System and Signal3 software (Cambridge Electronic Design, Cambridge, United Kingdom).