Research article summary (published 30 Aug 2006):

Exaggerated leftward bias in the mental number line of patients with schizophrenia.

Full Abstract

Several visuo-motor tasks can be used to demonstrate biases towards left hemispace in schizophrenic patients, suggesting a minor right hemineglect. Recent studies in neglect patients used a new number bisection task to highlight a lateralized defect in their visuo-spatial representation of numbers. To test a possible lateralized representational deficit in schizophrenia, we used the number bisection task in 11 schizophrenic patients compared to 11 healthy controls. Participants were required to orally indicate the central number of an interval orally presented. Whereas healthy subjects showed no significant bias, schizophrenic patients presented a significant leftward bias. Therefore, these results suggest an impairment in higher order representations of the number space in patients with schizophrenia, an impairment that is qualitatively similar to the deficit described in neglect patients.

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Author information

Author/s: Cavézian, Céline (C); Rossetti, Yves (Y); Danckert, James (J); d'Amato, Thierry (T); Dalery, Jean (J); Saoud, Mohamed (M);

Affiliation: UCBL1, EA 3092, CH Le Vinatier, 95 Boulevard Pinel, 69677 Bron Cedex, France.

Journal and publication information

Publication Type: Journal Article

Journal: Brain and cognition (Brain Cogn), published in United States. (Language: eng)

Reference: 2007-Feb; vol 63 (issue 1) : pp 85-90

Dates: Created 2006/12/12; Completed 2007/03/29;

PMID: 16949189, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult Female Functional Laterality - physiology Humans Male Mathematics Movement - physiology

Movement - physiology Orientation - physiology Pattern Recognition, Visual - physiology Perceptual Disorders - complications; physiopathology Schizophrenia - complications; physiopathology Space Perception - physiology Statistics, Nonparametric

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