Tuesday, January 22, 2008


schizophrenia /schizo·phre·nia/ (skit?so-fren´e-ah) (-fre´ne-ah) a mental disorder or group of disorders characterized by disturbances in the form and content of thought (e.g., delusions, hallucinations), in mood (e.g., inappropriate affect), in sense of self and relationship to the external world (e.g., loss of ego boundaries, withdrawal), and in behavior (e.g., bizarre or apparently purposeless behavior); it must cause marked decrease in functioning and be present for at least six months.schizophren´ic

catatonic schizophrenia a form characterized by psychomotor disturbance, which may be manifested by a marked decrease in reactivity to the environment and in spontaneous activity, by excited, uncontrollable, and apparently purposeless motor activity, by resistance to instructions or attempts to be moved, or by maintenance of a rigid posture or of fixed bizarre postures.
childhood schizophrenia former name for schizophrenia-like symptoms with onset before puberty, marked by autistic, withdrawn behavior, failure to develop an identity separate from the mother's, and gross developmental immaturity, now classified as pervasive developmental disorders.
disorganized schizophrenia , hebephrenic schizophrenia a form marked by disorganized and incoherent thought and speech, shallow, inappropriate, and silly affect, and regressive behavior without systematized delusions.
paranoid schizophrenia a form characterized by delusions, often with auditory hallucinations, with relative preservation of affect and cognitive functioning.
residual schizophrenia a condition manifested by individuals with symptoms of schizophrenia who, after a psychotic schizophrenic episode, are no longer psychotic.
undifferentiated schizophrenia a type characterized by the presence of prominent psychotic symptoms but not classifiable as catatonic, disorganized, or paranoid.

Dorland's Medical Dictionary for Health Consumers. © 2007 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

schiz·o·phre·ni·a (skts-frn-, -frn-)
Any of a group of psychotic disorders usually characterized by withdrawal from reality, illogical patterns of thinking, delusions, and hallucinations, and accompanied in varying degrees by other emotional, behavioral, or intellectual disturbances. Schizophrenia is associated with dopamine imbalances in the brain and may have an underlying genetic cause.

The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

schizophrenia (skit´sfrē´nē),
n (dementia praecox), a functional psychosis (split personality) characterized by emotional distortion, withdrawal from reality, and disturbances of thought processes. It includes such disorders as hebephrenia, catatonia, and paranoia.