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Smooth pursuit and saccadic abnormalities in first-episode schizophrenia.

Hutton, S. and Crawford, Trevor J. and Puri, B. K. and Duncan, L.-J. and Kennard, C. and Barnes, T. R. E. and Joyce, E. M. (1998) Smooth pursuit and saccadic abnormalities in first-episode schizophrenia. Psychological Medicine, 28 (3). pp. 685-692. ISSN 0033-2917

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Abstract

Background. Previous studies of oculomotor dysfunction in schizophrenia have tended to concentrate on abnormalities of smooth pursuit eye tracking in chronic medicated patients. We report the results of a study of smooth pursuit, re¯exive and antisaccade performance in drug naive and antipsychotic treated ®rst-episode schizophrenic patients. Methods. Smooth pursuit and saccadic eye movements were recorded in 36 ®rst-episode schizophrenic patients and 36 controls matched for age and estimated IQ. The schizophrenic patients were divided into drug-naive (N¯17) and antipsychotic treated groups (N¯19). Results. Smooth pursuit velocity gain was signi®cantly lower than controls only in the drug-naive patients. The treated patients did not differ signi®cantly from either the controls or the untreated group. In an antisaccade paradigm both treated and drug-naive schizophrenic patients demonstrated an increased number of errors, but only drug-naive patients also demonstrated an increased latency in initiating correct antisaccades. Conclusions. These impairments are unlikely to be due to a generalized de®cit in oculomotor function in the schizophrenic groups, as there were no differences between the groups in saccadic metrics on a re¯exive saccade task. The results show that both smooth pursuit and saccadic abnormalities are present at the onset of schizophrenia and are integral to the disorder.

Item Type: Article
Journal or Publication Title: Psychological Medicine
Additional Information: http://journals.cambridge.org/action/displayJournal?jid=PSM The final, definitive version of this article has been published in the Journal, Psychological Medicine, 28 (3), pp 685-692 1998, © 1998 Cambridge University Press.
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Departments: Faculty of Science and Technology > Psychology
ID Code: 11164
Deposited By: Dr Trevor Crawford
Deposited On: 04 Aug 2008 13:57
Refereed?: Yes
Published?: Published
Last Modified: 03 Dec 2016 01:11
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/11164

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