The neuroanatomic correlates of semantic memory deficits in patients with Gulf War illnesses: A pilot study

Clifford S. Calley, Michael A. Kraut, Jeffery S. Spence, Richard W. Briggs, Robert W. Haley, John Hart

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

We used functional magnetic resonance imaging (fMRI) to study semantic memory processing in 38 Gulf War veterans in 3 affected groups (Syndromes 1, 2, and 3) and normal-deployed controls. Subjects were given the Semantic Object Retrieval Test (SORT), which requires participants to decide whether two features combine and result in the retrieval of a specific object (e. g., "desert" and "humps" → "camel"). Differences between groups were calculated using a repeated measures analysis of variance (ANOVA). Then, regions of interest were constructed and correlations assessed between the percent signal change (PSC) within these regions, followed by correlations between behavioral measures and PSC. We found affected groups performed less well on the SORT than the controls did, and behavioral differences were correlated to PSC within the caudate and thalamus. The combination of performance deficits and functional neuroimaging differences between affected Gulf War veterans and deployed normal controls begins to establish a neurobiological basis for their word-finding deficits.

Original languageEnglish (US)
Pages (from-to)248-255
Number of pages8
JournalBrain Imaging and Behavior
Volume4
Issue number3-4
DOIs
StatePublished - Dec 1 2010

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Keywords

  • Gulf War illness
  • Semantic memory
  • Word finding
  • fMRI

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Neurology
  • Cognitive Neuroscience
  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Psychiatry and Mental health
  • Behavioral Neuroscience

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