Surface-based morphometry of the anterior cingulate cortex in first episode schizophrenia

Alexander Fornito, Murat Yucel, Stephen J Wood, Christopher Adamson, Dennis Velakoulis, Michael Saling, Patrick D McGorry, Christos Pantelis

Research output: Contribution to journalArticleResearchpeer-review

95 Citations (Scopus)

Abstract

The anterior cingulate cortex (ACC) appears to be critically involved in the pathophysiology of schizophrenia, but past attempts at characterizing pathological changes in the region using magnetic resonance imaging have been restricted by a limited appreciation of its functional and anatomical diversity and a reliance on relatively coarse metrics (e.g., volume) to index anatomical change. In this study, we applied a novel, surface-based protocol to T1-weighted scans acquired from 40 first episode schizophrenia patients and 40 healthy controls individually matched for age, sex, and morphology of the paracingulate sulcus, a major anatomical variation that has been shown to affect morphometric estimates in the region. The surface-based approach enabled calculation of regional grey matter volume, surface area and curvature, cortical thickness, and depth of the cingulate sulcus, with sub-millimeter precision. Relative to controls, schizophrenia patients displayed a bilateral reduction in thickness of paralimbic regions of the ACC, along with a concomitant increase in surface area of both the limbic and paralimbic ACC. No differences were identified for regional grey matter volume, surface curvature, or CS depth. These findings illustrate the advantages of moving beyond traditional volume-based approaches when investigating cortical morphometry, and indicate that the early stages of schizophrenia are associated with a specific pattern of ACC abnormalities that cannot be attributed to variations in sulcal and gyral morphology
Original languageEnglish
Pages (from-to)478 - 489
Number of pages12
JournalHuman Brain Mapping
Volume29
Issue number4
DOIs
Publication statusPublished - 2008
Externally publishedYes

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