Cognitive Control and White Matter Callosal Microstructure in Methamphetamine-Dependent Subjects: A Diffusion Tensor Imaging Study

Ruth Salo, Thomas E. Nordahl, Michael H Buonocore, Yutaka Natsuaki, Christy Waters, Charles D. Moore, Gantt P. Galloway, Martin H. Leamon

Research output: Contribution to journalArticle

72 Scopus citations

Abstract

Background: Methamphetamine (MA) abuse causes damage to structures within the human cerebrum, with particular susceptibility to white matter (WM). Abnormalities have been reported in anterior regions with less evidence of changes in posterior regions. Methamphetamine abusers have also shown deficits on attention tests that measure response conflict and cognitive control. Methods: We examined cognitive control with a computerized measure of the Stroop selective attention task and indices of WM microstructure obtained from diffusion tensor imaging (DTI) in the callosal genu and splenium of 37 currently abstinent MA abusers and 17 non-substance abusing control subjects. Measurements of fractional anisotropy (FA), apparent diffusion coefficient (ADC) of callosal fibers, and diffusion tensor eigenvalues were obtained in all subjects. Results: The MA abusers exhibited greater Stroop reaction time interference (i.e., reduced cognitive control) (p = .04) compared with control subjects. After correcting for multiple comparisons, FA within the genu correlated significantly with measures of cognitive control in the MA abusers (p = .04, Bonferroni corrected) but not in control subjects (p = .26). Group differences in genu but not splenium FA were trend significant (p = .09). Conclusions: Methamphetamine abuse seems to alter anterior callosal WM microstructure with less evidence of change within posterior callosal WM microstructure. The DTI indices within the genu but not splenium correlated with measures of cognitive control in chronic MA abusers.

Original languageEnglish (US)
Pages (from-to)122-128
Number of pages7
JournalBiological Psychiatry
Volume65
Issue number2
DOIs
StatePublished - Jan 15 2009

Keywords

  • Cognitive control
  • corpus callosum
  • diffusion tensor imaging
  • methamphetamine
  • Stroop
  • substance abuse

ASJC Scopus subject areas

  • Biological Psychiatry

Fingerprint Dive into the research topics of 'Cognitive Control and White Matter Callosal Microstructure in Methamphetamine-Dependent Subjects: A Diffusion Tensor Imaging Study'. Together they form a unique fingerprint.

  • Cite this