Is lateral bias anomalous in early-onset schizophrenia? Selected comparisons with normal populations

The aim of this study was to investigate lateral bias in patients with early-onset schizophrenia. Hand, eye, and foot preferences and relative hand skill were examined in early-onset patients ( n=44) and matched controls ( n=39), and were compared with population estimates. Patients demonstrated a s...

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Bibliographic Details
Published in:Psychiatry research 2004-03, Vol.125 (3), p.219-224
Main Authors: Collinson, Simon L., Phillips, Tania Jane, James, Anthony C.D., Quested, Digby J., Crow, Timothy J.
Format: Article
Language:English
Subjects:
Activity levels. Psychomotricity
Adolescent
Adult
Adult and adolescent clinical studies
Age of Onset
Biological and medical sciences
Brain - physiology
Child
Eye preference
Female
Foot - physiology
Foot preference
Functional Laterality - physiology
Fundamental and applied biological sciences. Psychology
Handedness
Humans
Laterality
Male
Medical sciences
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychomotor activities
Psychopathology. Psychiatry
Psychoses
Schizophrenia
Schizophrenia - epidemiology
Visual Fields - physiology
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Summary:The aim of this study was to investigate lateral bias in patients with early-onset schizophrenia. Hand, eye, and foot preferences and relative hand skill were examined in early-onset patients ( n=44) and matched controls ( n=39), and were compared with population estimates. Patients demonstrated a significant excess in mixed handedness (20.5% vs. 8.5%) relative to population estimates and reduced relative hand skill on a pegboard task compared with controls. Left eye preference was significantly less common in schizophrenic patients relative to population estimates. Crossed eye-hand and eye-foot preferences were not significantly increased in the patient group as a whole but were present, respectively, in four of nine and five of nine mixed-handed patients but in none of five mixed-handed controls. These findings are consistent with the view that lateralisation is anomalous in schizophrenia early in the course of illness.
ISSN:0165-1781
1872-7123
DOI:10.1016/j.psychres.2003.12.018