[Analysis of the basic bioelectric action of the brain in workers chronically exposed to certain organic solvents].

The bioelectric action of the brain was analysed by means of EEC examination with an exclusive or almost exclusive alpha rythm in workers chronically exposed to tetrachloroethylene and in workers exposed to the mixture of solvents which contain aliphatic derivatives of benzene with nine or ten carbon atoms. The study covered 30 male workers of the similar age group, period of employment and work shifts. No symptoms of the nervous system damage were observed. There were either no significant differences in the frequency of alpha rythm according to EEC examination in workers exposed to organic solvents when compared with controls.