[Movement-related brain potentials during the treatment of parkinsonism]

The authors studied motor associated brain potentials (MABP) in patients with disturbed motor function (hypertonia, tremor) due to affection of the basal ganglia (parkinsonism) and studied the changes of these potentials after stereotaxic operations conducted for the correction of the motor pathology. It was found that in a favourable effect of operative treatment manifested by decrease of the tonus and inhibition of tremor in patients with parkinsonism, there was a tendency towards normalization of MABP. Restoration of some of the components of the motor response and in certain cases of the MABP on the whole occurred on the 14-16th postoperative day. No clearly defined changes of motor associated potentials characteristic of different forms of parkinsonism were discovered.