[Clinical picture of "difficult" adolescents].

Some data of a comprehensive clinico-psychological, anthropological, neurological and neurophysiological study of 150 adolescents--75 "difficult ones" and 75 in the control group are presented. There were 3 main clinico-psychopathological variants of disturbed behaviour; with a prevalence of instability, affective explosiveness and desinhibition of drives. It was possible to demonstrate their pathogenetical connections with some biological traits (abnormal sexual maturation, insufficiency of the nervous system, mainly of an organic character) and environmental factors, which to a certain extent were specific for each of these variants.