Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.pscychresns.2009.02.003
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dc.titleWhite matter abnormalities and neurocognitive deficits associated with the passivity phenomenon in schizophrenia: A diffusion tensor imaging study
dc.contributor.authorSim, K.
dc.contributor.authorYang, G.L.
dc.contributor.authorNowinski, W.
dc.contributor.authorLoh, D.
dc.contributor.authorPoon, L.Y.
dc.contributor.authorVerma, S.
dc.contributor.authorChong, S.A.
dc.contributor.authorSitoh, Y.Y.
dc.contributor.authorKeefe, R.
dc.contributor.authorCollinson, S.
dc.contributor.authorHeckers, S.
dc.contributor.authorPantelis, C.
dc.date.accessioned2011-02-23T02:52:12Z
dc.date.available2011-02-23T02:52:12Z
dc.date.issued2009
dc.identifier.citationSim, K., Yang, G.L., Nowinski, W., Loh, D., Poon, L.Y., Verma, S., Chong, S.A., Sitoh, Y.Y., Keefe, R., Collinson, S., Heckers, S., Pantelis, C. (2009). White matter abnormalities and neurocognitive deficits associated with the passivity phenomenon in schizophrenia: A diffusion tensor imaging study. Psychiatry Research - Neuroimaging 172 (2) : 121-127. ScholarBank@NUS Repository. https://doi.org/10.1016/j.pscychresns.2009.02.003
dc.identifier.issn09254927
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/19552
dc.description.abstractThe passivity phenomenon is a distressing Schneiderian first rank symptom in patients with schizophrenia. Based on extant data of functional and structural cerebral changes underlying passivity, we sought to examine cerebral white matter integrity in our subjects. We hypothesised that the passivity phenomenon would be associated with white matter changes in specific cortical (frontal, parietal cortices, and cingulate gyrus) and subcortical regions (thalamus and basal ganglia) and correlated with relevant neurocognitive deficits, compared with characteristics in those without the passivity phenomenon. Thirty-six subjects (11 with passivity and 25 without passivity) with schizophrenia were compared with 32 age-, gender- and handedness-matched healthy controls using diffusion tensor imaging. Neuropsychological testing was administered. Patients with passivity were associated with increased fractional anisotropy within the frontal cortex, cingulate gyrus, and basal ganglia and decreased fractional anisotropy within the thalamus when compared with patients without passivity. Within patients with passivity, fractional anisotropy in the frontal cortex correlated with the age of onset of illness and neurocognitive deficits related to attention and executive functioning. The findings suggest distributed involvement of cortical and subcortical regions underlying passivity and support the notion of neural network models underlying specific psychiatric symptoms such as passivity. © 2009 Elsevier Ireland Ltd. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.pscychresns.2009.02.003
dc.sourceScopus
dc.subjectCingulate
dc.subjectCortical
dc.subjectFrontal
dc.subjectNeural
dc.subjectSubcortical
dc.subjectThalamus
dc.typeArticle
dc.contributor.departmentPSYCHOLOGY
dc.description.doi10.1016/j.pscychresns.2009.02.003
dc.description.sourcetitlePsychiatry Research - Neuroimaging
dc.description.volume172
dc.description.issue2
dc.description.page121-127
dc.description.codenPSREE
dc.identifier.isiut000265779800006
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