G. Pfurtscheller et al., POST-MOVEMENT BETA-SYNCHRONIZATION - A CORRELATE OF AN IDLING MOTOR AREA, Electroencephalography and clinical neurophysiology, 98(4), 1996, pp. 281-293
Post-movement beta (around 20 Hz) synchronization was investigated in
2 experiments with self-paced finger extension and flexion and externa
lly paced wrist movement. The electrodes were fixed over the sensorimo
tor area in distances of 2.5 cm. It was found that after a brisk finge
r movement the desynchronized beta rhythm displayed a fast recovery an
d a short-lasting synchronization within 1 sec. This post-movement bet
a synchronization was maximal over the contralateral hemisphere and lo
calized slightly more anterior to the maximal desynchronization of the
hand area mu rhythm. The post-movement beta synchronization is interp
reted as a correlate of ''idling'' motor cortex neurons.