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Cognitive functioning and symptomatology in chronic schizophrenia

Published online by Cambridge University Press:  09 July 2009

Hazel E. Nelson ,
Christos Pantelis ,
Kathryn Carruthers ,
Jeremy Speller ,
Sallie Baxendale  and
Thomas R. E. Barnes
Hazel E. Nelson*
Affiliation:
Charing Cross and Westminster Medical School, Academic Unit, Horton Hospital, Epsom, Surrey
Christos Pantelis
Affiliation:
Charing Cross and Westminster Medical School, Academic Unit, Horton Hospital, Epsom, Surrey
Kathryn Carruthers
Affiliation:
Charing Cross and Westminster Medical School, Academic Unit, Horton Hospital, Epsom, Surrey
Jeremy Speller
Affiliation:
Charing Cross and Westminster Medical School, Academic Unit, Horton Hospital, Epsom, Surrey
Sallie Baxendale
Affiliation:
Charing Cross and Westminster Medical School, Academic Unit, Horton Hospital, Epsom, Surrey
Thomas R. E. Barnes
Affiliation:
Charing Cross and Westminster Medical School, Academic Unit, Horton Hospital, Epsom, Surrey
*
1Address for correspondence: Dr H. E. Nelson, Department of Psychology, Horton Hospital, Epsom, Surrey KT19 8PZ.
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Synopsis

Chronic schizophrenic patients in a long stay hospital were found to have low levels of intelligence (mean IQ of 80), which was attributed to the effects of substantial intellectual deterioration on below average pre-morbid levels of functioning. Patients with the lowest IQ scores had the least severe positive symptoms but symptomatology was not related to age or extent of intellectual decline. Speed of functioning was relatively more impaired than level of intellectual functioning, with cognitive speed being more affected than motor speed. The severity of negative but not positive symptoms was significantly related to the severity of bradyphrenia (cognitive slowing), a result which would be consistent with the notion of a subcortical pathology in patients with Type II schizophrenia.

Type
Original Articles
Information
Psychological Medicine , Volume 20 , Issue 2 , May 1990 , pp. 357 - 365
Copyright
Copyright © Cambridge University Press 1990

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