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ORIGINAL RESEARCH article

Front. Psychiatry

Sec. Schizophrenia

Volume 16 - 2025 | doi: 10.3389/fpsyt.2025.1566184

Cerebral Perfusion Differences in the Visual Cortex and Fusiform Subregions Across the Psychosis Spectrum

Provisionally accepted
  • 1 Advanced Imaging Research, Swiss Paraplegic Research, Nottwil, Switzerland
  • 2 ETH Zürich, Zurich, Zürich, Switzerland
  • 3 Division of Translational Neuroscience, Beth Israel Deaconess Medical Center, Boston, United States
  • 4 Department of Psychiatry, Beth Israel Deaconess Medical Center, Boston, United States
  • 5 Institute for Radiopharmaceutical Cancer Research, Helmholtz Center Dresden-Rossendorf, Helmholtz Association of German Research Centers (HZ), Dresden, Lower Saxony, Germany
  • 6 Department of Radiology and Nuclear Medicine, VU Medical Center, Amsterdam, Netherlands, Netherlands
  • 7 Amsterdam Neuroscience, Brain Imaging, Amsterdam, Netherlands
  • 8 Department of Psychiatry, Harvard Medical School, Boston, Massachusetts, United States
  • 9 Department of Psychiatry, Medical School, University of Texas Southwestern Medical Center, Dallas, Texas, United States
  • 10 Binghamton University, Binghamton, New York, United States
  • 11 Department of Psychiatry, University of Chicago, Chicago, Illinois, United States
  • 12 Departments of Psychology and Neuroscience, BioImaging Research Center, University of Georgia, Athens, United States
  • 13 Olin Neuropsychiatry Research Center, Institute of Living, Hartford Hospital, Hartford, Connecticut, United States
  • 14 Departments of Psychiatry and Neuroscience, Yale University, New Haven, United States

The final, formatted version of the article will be published soon.

    Background: Approximately 50% of individuals with psychosis spectrum disorders (PSD) experience visual hallucinations and deficits in visual processing. Cerebral blood flow (CBF) alterations have been identified in the occipital lobe (OL) and fusiform gyrus (FG) in PSD.However, prior studies neither report on cytoarchitectonic subregions of the OL or FG, nor their correlations with cognition. Moreover, perfusion differences across neurobiologically defined psychosis Biotypes in these regions are not investigated yet.Methods: ExploreASL and FreeSurfer were used to extract perfusion measures from pseudocontinuous arterial spin labeling scans of visual (hOc1-hOc3v, middle temporal area (MT)) and fusiform (FG2-FG4) subregions in 122 bipolar disorder with psychosis (BP), 179 schizoaffective disorder (SAD), 203 schizophrenia (SZ), and 350 healthy controls (NC), as well as psychosis Biotypes (BT1-3). The data was adjusted for scanner effects using ComBat.Analyses were co-varied for total gray matter CBF. We used R to perform statistical comparisons across PSD and NC and across Biotypes. Partial Spearman correlation was performed between CBF and cognitive measures. Benjamini & Hochberg correction was used to correct for multiple comparisons.Results: PSD exhibited greater perfusion in MT and FG2 compared to NC. Perfusion significantly differed across psychosis Biotypes in hOc1 but not across diagnostic groups.Higher MT and FG4 perfusion in PSD were associated with worse overall cognitive performance.Conclusions: Visual and fusiform subregions demonstrate significant perfusion alterations which may indicate neurovascular deficits in PSD. Moreover, these perfusion alterations may contribute to cognitive impairments and visual abnormalities in psychosis.

    Keywords: Arterial Spin Labeling, cerebral blood flow, V5/MT, fusiform gyrus, Psychosis Spectrum Disorders, Cognition

    Received: 24 Jan 2025; Accepted: 24 Mar 2025.

    Copyright: © 2025 Sritharan, Zeng, Petr, Mutsaerts, Hoang, Bolo, Ivleva, Dai, Gershon, Keedy, Parker, Trotti, McDowell, Clementz, Tamminga, Pearlson, Keshavan and Lizano. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Paulo Lizano, Department of Psychiatry, Beth Israel Deaconess Medical Center, Boston, United States

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.

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