
Am J Psychiatry 2009; 166:1041-1047
(published online July 15, 2009; doi: 10.1176/appi.ajp.2009.08091400)
© 2009 American Psychiatric Association
Childhood Motor Coordination and Adult Schizophrenia Spectrum Disorders
Jason Schiffman, Ph.D.,
Holger J. Sorensen, M.D.,
Justin Maeda, M.A.,
Erik L. Mortensen, Cand.Psych.,
Jeff Victoroff, M.D.,
Kentaro Hayashi, Ph.D.,
Niels M. Michelsen, M.D.,
Morten Ekstrom, M.D., and
Sarnoff Mednick, Ph.D., Dr.Med.
OBJECTIVE: The authors examined whether motor coordination difficulties assessed in childhood predict later adult schizophrenia spectrum outcomes. METHOD: A standardized childhood neurological examination was administered to a sample of 265 Danish children in 1972, when participants were 10–13 years old. Adult diagnostic information was available for 244 members of the sample. Participants fell into three groups: children whose mothers or fathers had a psychiatric hospital diagnosis of schizophrenia (N=94); children who had at least one parent with a psychiatric record of hospitalization for a nonpsychotic disorder (N=84); and children with no parental records of psychiatric hospitalization (N=66). Psychiatric outcomes of the offspring were assessed through psychiatric interviews in 1992 when participants were 31–33 years of age, as well as through a scan of national psychiatric registers completed in May 2007. RESULTS: Children who later developed a schizophrenia spectrum disorder (N=32) displayed significantly higher scores on a scale of coordination deficits compared with those who did not develop a mental illness in this category (N=133). CONCLUSIONS: Results from this study provide further support for the neurodevelopmental hypothesis of schizophrenia and underscore the potential role of cerebellar and/or basal ganglia abnormalities in the etiology and pathophysiology of schizophrenia.
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