catatonic schizophrenia [Gk, kata + tonos + schizein, to split, phren, mind] , a form of schizophrenia characterized by alternating periods of extreme withdrawal and extreme excitement. During the withdrawal stage, stupor, waxy flexibility, muscular rigidity, mutism, blocking, negativism, and catalepsy (cerea flexibilitas) may be seen. During the period of excitement, purposeless and impulsive activity may range from mild agitation to violence. See also catatonia.
