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Catatonic type schizophrenia

Patients with this subtype of Schizophrenia may exhibit extremes of behavior including catatonia. Some may allow their posture to be rearranged, holding the new position (catalepsy or waxy flexibility). Others may imitate sounds (echolalia) or movements (echopraxia) of others. At times, some patients may explode into an excited, activated state marked by purposeless ad repetitive movements. The catatonic type is rare today, and probably reflected an advanced stage of schizophrenia before the advent of modern treatment methods.

Disorganized type schizophrenia

A form of schizophrenia that is characterized by a disorganized behavior and disorganized speech. Their affect may be flat or inappropriate. This type involves a disturbance in behavior, communication, and thought. Usually these patients show a variety of eccentric characteristics such as unusual clothing or peculiar gestures.

Paranoid type schizophrenia

Delusions and auditory hallucinations predominate in patients with this subtype of schizophrenia while their affective and cognitive functioning remains relatively intact. This type of patient often has highly elaborate delusions of persecution or personal grandeur. However, the patient may appear rather normal until he or she becomes entangled in typical argumentativeness and suspiciousness.

Residual type schizophrenia

A form of schizophrenia that is characterized by a previous diagnosis of schizophrenia, but no longer having any of the prominent psychotic symptoms. There are some remaining symptoms of the disorder however, such as eccentric behavior, emotional blunting, illogical thinking, or social withdrawal.

In the residual type of schizophrenia, the patient has had at least one episode of schizophrenia. If delusions or hallucinations are present, they are not prominent, and are not accompanied by strong affect.

Undifferentiated type schizophrenia

This subtype of schizophrenia applies to patients who fail to meet the criteria for the other subtypes but clearly suffer from this mental disorder. The patient suffers from pronounced psychotic symptoms, which may not fit in any other specific category or more than one.