Lancaster EPrints

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

[img]
Preview
PDF (16.pdf)
Download (163Kb) | Preview

    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: 26 Jul 2012 14:57
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/11164

    Actions (login required)

    View Item