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Motor perseverations in schizophrenia.

R M Bilder¹, E Goldberg

¹New York State Psychiatric Institute, Creedmoor Psychiatric Center, Columbia University College of Physicians & Surgeons, Quenns Village 11427, USA.

Archives of Clinical Neuropsychology : the Official Journal of the National Academy of Neuropsychologists

|January 1, 1987

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Chronic schizophrenic patients exhibit significant motor perseverations, similar to those seen in frontal lobe damage. This finding supports the theory of prefrontal cortex dysfunction in schizophrenia.

Area of Science:

Neuropsychology
Cognitive Neuroscience
Psychiatry

Background:

Prefrontal syndromes are classically described by productive symptoms, notably motor perseverations.
Assertions of prefrontal dysfunction in chronic schizophrenia require reliable demonstration of such symptoms.

Purpose of the Study:

To investigate the presence and characteristics of motor perseverations in chronic schizophrenic inpatients.
To compare these perseverations with those found in patients with known frontal lobe lesions.

Main Methods:

Utilized techniques validated in studies of frontal lobe lesions to elicit motor perseverations.
Assessed a sample of chronic schizophrenic inpatients.

Main Results:

Related Experiment Videos

Conspicuous motor perseverations were demonstrated in the chronic schizophrenic sample.

The observed perseverations closely matched the severity and typology of those in focal prefrontal cortex damage.

Conclusions:

The findings provide evidence for prefrontal dysfunction in chronic schizophrenia.
Motor perseverations are a reliable indicator of prefrontal impairment in this patient group.