[Cerebral dysfunction, neurologic symptoms and recurrent delinquency--I. Review of the literature].

Men with polytropic and persistent delinquency constitute a core group of criminal offenders. Criminological research could establish a set of social characteristics for this group, but psychiatric, neurological and neuropsychological variables with importance to the formation of delinquent recidivism are rarely investigated. In this study we give a survey of the results concerning the relevance of genetic factors for delinquent behaviour. Then we review the development of the "minimal brain disorder" conception and its changes to "hyperkinetic syndrome", "attention deficit disorder" and to specific developmental disorders, which are all associated with a higher degree of conduct disorders and delinquent behaviour. We finally discuss the stability and relevance of nonfocal neurological ("soft") signs and depict a tentative model of the relations between the influential factors. Part II of this study (66) gives an account of the results of the "Heidelberg Delinquency Study" in this area.