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Behavioural Neurology
Volume 6 (1993), Issue 1, Pages 49-54

Dyspraxia and Agnosia in Schizophrenia

P. F. Liddle,1,2 S. Haque,1 D. L. Morris,1 and T. R. E. Barnes1

1Charing Cross and Westminster Medical School, St Dunstans Road, London W6 8RP, UK
2Department of Psychological Medicine, Royal Post Graduate Medical School, DuCane Road, London W120HS, UK

Received 23 March 1993; Accepted 2 April 1993

Copyright © 1993 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A battery of tests for dyspraxia and agnosia was administered to 51 chronic schizophrenic patients to test the hypothesis that these cortical neurological signs are associated with psychomotor poverty syndrome (poverty of speech, flat affect, decreased spontaneous movement), disorganization syndrome (various disorders of the form of thought, inappropriate affect), abnormal involuntary movements, cognitive impairment, and duration of illness. The findings supported all elements of the hypothesis, and in particular, demonstrated a strong correlation of cortical signs with psychomotor poverty and with cognitive impairment.