RESPONSES OF HUMAN PRIMARY SENSORIMOTOR AND SUPPLEMENTARY MOTOR AREASTO INTERNALLY TRIGGERED UNILATERAL AND SIMULTANEOUS BILATERAL ONE-DIGIT MOVEMENTS - A HIGH-RESOLUTION EEG STUDY

We modelled the responses of human primary sensorimotor areas and supp lementary motor area to simple, self-initiated unilateral and simultan eous bilateral middle finger movements using a novel high-resolution e lectroencephalography technology. The results support the view that th ese cortical motor areas are involved in parallel and present similar activity in the preparation, initiation, and execution of the contrala teral and bilateral movements. Furthermore, the left primary sensorimo tor area (dominant hemisphere) appears to be activated more than the r ight primary sensorimotor area during the preparation and performance of the ipsilateral movements.