“…The time interval between the head injury and the onset of psychotic symptoms varies, and when a year or so elapses between the two, even though various symptoms have persisted during that period, it is difficult to relate the psychosis to the head injury as a direct cause, but the head injury may be a contributory cause." Psychotic conditions following brain injuries have also been dealt with by Meinertr (1959), Kozol (1945), Lemke (1942), Leonhardt (1953), Eitinger (1959), Skolnick (1937), Nielsen (1958), Kehrer (1953), and Kolle (1958). Gruhle (1932) stated.…”