Visual hallucinations are associated with hyperconnectivity between the amygdala and visual cortex in people with a diagnosis of schizophrenia.

Published

Journal Article

While auditory verbal hallucinations (AH) are a cardinal symptom of schizophrenia, people with a diagnosis of schizophrenia (SZ) may also experience visual hallucinations (VH). In a retrospective analysis of a large sample of SZ and healthy controls (HC) studied as part of the functional magnetic resonance imaging (fMRI) Biomedical Informatics Research Network (FBIRN), we asked if SZ who endorsed experiencing VH during clinical interviews had greater connectivity between visual cortex and limbic structures than SZ who did not endorse experiencing VH.We analyzed resting state fMRI data from 162 SZ and 178 age- and gender-matched HC. SZ were sorted into groups according to clinical ratings on AH and VH: SZ with VH (VH-SZ; n = 45), SZ with AH but no VH (AH-SZ; n = 50), and SZ with neither AH nor VH (NoH-SZ; n = 67). Our primary analysis was seed based, extracting connectivity between visual cortex and the amygdala (because of its role in fear and negative emotion) and visual cortex and the hippocampus (because of its role in memory).Compared with the other groups, VH-SZ showed hyperconnectivity between the amygdala and visual cortex, specifically BA18, with no differences in connectivity among the other groups. In a voxel-wise, whole brain analysis comparing VH-SZ with AH-SZ, the amygdala was hyperconnected to left temporal pole and inferior frontal gyrus in VH-SZ, likely due to their more severe thought broadcasting.VH-SZ have hyperconnectivity between subcortical areas subserving emotion and cortical areas subserving higher order visual processing, providing biological support for distressing VH in schizophrenia.

Full Text

Duke Authors

Cited Authors

  • Ford, JM; Palzes, VA; Roach, BJ; Potkin, SG; van Erp, TGM; Turner, JA; Mueller, BA; Calhoun, VD; Voyvodic, J; Belger, A; Bustillo, J; Vaidya, JG; Preda, A; McEwen, SC; Functional Imaging Biomedical Informatics Research Network, ; Mathalon, DH

Published Date

  • January 2015

Published In

Volume / Issue

  • 41 / 1

Start / End Page

  • 223 - 232

PubMed ID

  • 24619536

Pubmed Central ID

  • 24619536

Electronic International Standard Serial Number (EISSN)

  • 1745-1701

International Standard Serial Number (ISSN)

  • 1787-9965

Digital Object Identifier (DOI)

  • 10.1093/schbul/sbu031

Language

  • eng