Altered brain activation in military personnel with one or more traumatic brain injuries following blast

Randall S. Scheibel, Mary R. Newsome, Maya Troyanskaya, Xiaodi Lin, Joel L. Steinberg, Majdi Radaideh, Harvey S. Levin

Research output: Contribution to journalArticle

50 Scopus citations

Abstract

Explosive blast is a frequent cause of traumatic brain injury (TBI) among personnel deployed to Afghanistan and Iraq. Functional magnetic resonance imaging (fMRI) with an event-related stimulus-response compatibility task was used to compare 15 subjects with mild, chronic blast-related TBI with 15 subjects who had not experienced a TBI or blast exposure during deployment. Six TBI subjects reported multiple injuries. Relative to the control group, TBI subjects had slightly slower responses during fMRI and increased somatic complaints and symptoms of post-traumatic stress disorder (PTSD) and depression. A between-group analysis indicated greater activation during stimulus-response incompatibility in TBI subjects within the anterior cingulate gyrus, medial frontal cortex, and posterior cerebral areas involved in visual and visual-spatial functions. This activation pattern was more extensive after statistically controlling for reaction time and symptoms of PTSD and depression. There was also a negative relationship between symptoms of PTSD and activation within posterior brain regions. These results provide evidence for increased task-related activation following mild, blast-related TBI and additional changes associated with emotional symptoms. Limitations of this study include no matching for combat exposure and different recruitment strategies so that the control group was largely a community-based sample, while many TBI subjects were seeking services.

Original languageEnglish (US)
Pages (from-to)89-100
Number of pages12
JournalJournal of the International Neuropsychological Society
Volume18
Issue number1
DOIs
StatePublished - Jan 2012

Keywords

  • Brain concussion
  • Brain mapping
  • Executive function
  • PTSD
  • Post-concussion syndrome
  • fMRI

ASJC Scopus subject areas

  • Neuroscience(all)
  • Clinical Psychology
  • Clinical Neurology
  • Psychiatry and Mental health

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