A symptom of catatonic schizophrenia. The person is nearly or completely unresponsive to stimuli and remains immobile for long periods of time.
Example: A schizophrenic man stands stock-still near his bed. When a psychiatrist lifts the man’s arm, it remains in the exact same position for hours after she lets go.
Last reviewed: By John M. Grohol, Psy.D. on 18 Nov 2008