Mapping finger movements by transcranial magnetic stimulation

We used transcranial magnetic stimulation (TMS) to characterise, in detail, the kinematic properties of finger movements evoked by stimulation of the motor cortex. Finger movements evoked by TMS at 30 different stimulation sites on the scalp (5×6 grid, 15 stimuli per site, 1.3–1.4 times resting motor threshold) were recorded at rest using an instrumented glove equipped with 10 sensors (60Hz sampling rate) at the two most proximal finger joints. Electromyographic recordings were obtained from the abductor pollicis brevis muscle (APB, 10 subjects) and the abductor digiti minimi muscle (ADM, 8 subjects). Across sub…