Journal
NEUROSCIENCE LETTERS
Volume 424, Issue 2, Pages 127-132Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.neulet.2007.07.042
Keywords
autism; diffusion tensor imaging; superior temporal gyrus; temporal stem; white matter; anisotropy; diffusivity; magnetic resonance imaging
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Funding
- NICHD NIH HHS [HD35476] Funding Source: Medline
- NIDA NIH HHS [DA15879] Funding Source: Medline
- NIMH NIH HHS [MH 62015] Funding Source: Medline
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Recent MRI studies have indicated that regions of the temporal lobe including the superior temporal gyrus (STG) and the temporal stem (TS) appear to be abnormal in autism. In this study, diffusion tensor imaging (DTI) measurements of white matter in the STG and the TS were compared in 43 autism and 34 control subjects. DTI measures of mean diffusivity, fractional anisotropy, axial diffusivity, and radial diffusivity were compared between groups. In all regions, fractional anisotropy was significantly decreased and both mean diffusivity and radial diffusivity were significantly increased in the autism group. These results suggest that white matter microstructure in autism is abnormal in these temporal lobe regions, which is consistent with theories of aberrant brain connectivity in autism. (C) 2007 Published by Elsevier Ireland Ltd.
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