[Differential and general effects of psychotropic pharmaceuticals on the human EEG].

Spectrum analyses in the examination of the electroencephalographic effects of psychotropic drugs--Etifoxine and Nomifensine--indicate that apart from the general changes, which appear with Nomifensine for example as an increase in the relative proportion of production of the Beta activity, differential effects also arise. They depend on the individual arrangement of the alpha activity and manifest themselves in a variable course during the change in structure of the electrical activity of the brain, which occurs during the drug-induced decrease in awareness.