Title: Asymmetry of lexico-semantic processing in schizophrenia changes with disease progression
year: 2012
Journal: Schizophr Res
Volume: 134
Issue: 02/03/2016
Pages: 125-30
Epubdate: 06/12/2011
date: Feb
Alternate Journal: Schizophrenia research
DOI: 10.1016/j.schres.2011.10.020
Accession Number: 22138046
Abstract: BACKGROUND: Are anomalies of cerebral asymmetry integral to the disease process? Here, we examined the influence of age, chronicity and age of onset of illness in 34 patients with early onset schizophrenia and 20 controls in relation to structural asymmetries of the temporal lobe and performance asymmetries on a semantic language lexical decision task. METHODS: Volumetric MRI and a novel divided visual field probe of lateralised lexico-semantic language were assessed in patients with early onset schizophrenia (EOS) and controls. Novel ratios of age-illness overlap and directional asymmetry were developed in order to examine the association of chronicity factors to asymmetry. RESULTS: Loss of laterality on the lexical decision task and discordant structural asymmetry were correlated with duration of illness but were not seen in younger, less chronic patients. Reduced lateral processing speed, and discordant structural asymmetry were associated with greater proportion of lifetime schizophrenia. CONCLUSION: Although the conclusions are limited by the cross sectional nature of the study, anomalies of cerebral asymmetry in early onset patients may be an index of disease progression, and reflect directly on the disease process.
URI: https://open-access.imh.com.sg/handle/123456789/4561
Authors Address: Research Division
Institute of Mental Health
Singapore.
Database Provider: NLM
language: eng
Appears in Collections:2012

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