Neurological abnormalities and cognitive ability in first-episode psychosis.
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Authors
Dazzan, Paola
Lloyd, Tuhina
Morgan, Kevin D
Zanelli, Jolanta
Morgan, Craig
Orr, Ken
Hutchinson, Gerard
Fearon, Paul
Allin, Matthew
Rifkin, Larry
Issue Date
2008-Sep
Type
Journal Article
Multicenter Study
Research Support, Non-U.S. Gov't
Multicenter Study
Research Support, Non-U.S. Gov't
Language
en
Keywords
Alternative Title
Abstract
It remains unclear if the excess of neurological soft signs, or of certain types of neurological soft signs, is common to all psychoses, and whether this excess is simply an epiphenomenon of the lower general cognitive ability present in psychosis.
To investigate whether an excess of neurological soft signs is independent of diagnosis (schizophrenia v. affective psychosis) and cognitive ability (IQ).
Evaluation of types of neurological soft signs in a prospective cohort of all individuals presenting with psychoses over 2 years (n=310), and in a control group from the general population (n=239).
Primary (P<0.001), motor coordination (P<0.001), and motor sequencing (P<0.001) sign scores were significantly higher in people with any psychosis than in the control group. However, only primary and motor coordination scores remained higher when individuals with psychosis and controls were matched for premorbid and current IQ.
Higher rates of primary and motor coordination signs are not associated with lower cognitive ability, and are specific to the presence of psychosis.
To investigate whether an excess of neurological soft signs is independent of diagnosis (schizophrenia v. affective psychosis) and cognitive ability (IQ).
Evaluation of types of neurological soft signs in a prospective cohort of all individuals presenting with psychoses over 2 years (n=310), and in a control group from the general population (n=239).
Primary (P<0.001), motor coordination (P<0.001), and motor sequencing (P<0.001) sign scores were significantly higher in people with any psychosis than in the control group. However, only primary and motor coordination scores remained higher when individuals with psychosis and controls were matched for premorbid and current IQ.
Higher rates of primary and motor coordination signs are not associated with lower cognitive ability, and are specific to the presence of psychosis.
Description
Citation
Publisher
License
Journal
The British journal of psychiatry : the journal of mental science
Volume
193
Issue
3
PubMed ID
ISSN
0007-1250