The effects of magnetic field (frequency - 8 Hz, induction - 20 mu l,
exposition time - 6 min) on movement -related activity of neocortex ne
urons and spontaneously firing nigral unit's of avake cats were studie
d. Exposure io field produced the modulation of the early neuronal act
ivity preceding self-iniciated arm movements in parietal cortex (area
5) and the increase of nigral cells firing rate.