Reduced habituation in patients with schizophrenia

Lisa E. Williams, Jennifer Urbano Blackford, Andrew Luksik, Isabel Gauthier, Stephan Heckers

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

Background: Neural habituation, the decrease in brain response to repeated stimulation, is a basic form of learning. There is strong evidence for behavioral and physiological habituation deficits in schizophrenia, and one previous study found reduced neural habituation within the hippocampus. However, it is unknown whether neural habituation deficits are specific to faces and limited to the hippocampus. Here we studied habituation of several brain regions in schizophrenia, using both face and object stimuli. Post-scan memory measures were administered to test for a link between hippocampal habituation and memory performance. Methods: During an fMRI scan, 23 patients with schizophrenia and 21 control subjects viewed blocks of a repeated neutral face or neutral object, and blocks of different neutral faces and neutral objects. Habituation in the hippocampus, primary visual cortex and fusiform face area (FFA) was compared between groups. Memory for faces, words, and word pairs was assessed after the scan. Results: Patients showed reduced habituation to faces in the hippocampus and primary visual cortex, but not the FFA. Healthy control subjects exhibited a pattern of hippocampal discrimination that distinguished between repeated and different images for both faces and objects, and schizophrenia patients did not. Hippocampal discrimination was positively correlated with memory for word pairs. Conclusion: Patients with schizophrenia showed reduced habituation of the hippocampus and visual cortex, and a lack of neural discrimination between old and new images in the hippocampus. Hippocampal discrimination correlated with memory performance, suggesting reduced habituation may contribute to the memory deficits commonly observed in schizophrenia.

Original languageEnglish (US)
Pages (from-to)124-132
Number of pages9
JournalSchizophrenia Research
Volume151
Issue number1-3
DOIs
StatePublished - Dec 2013
Externally publishedYes

Keywords

  • Faces
  • FMRI adaptation
  • Habituation
  • Hippocampus
  • Repetition suppression
  • Schizophrenia

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry

Fingerprint

Dive into the research topics of 'Reduced habituation in patients with schizophrenia'. Together they form a unique fingerprint.

Cite this