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- W2034454761 abstract "Background Diffusion tensor imaging (DTI) enables measurements and visualization of the microstructure of neural fiber tracts. The existing literature on autism spectrum disorders (ASDs) and DTI is heterogenous both regarding methodology and results. Purpose To compare brain white matter of high-functioning individuals with ASDs and controls. Material and Methods Tract-based spatial statistics (TBSS), a voxel-based approach to DTI, was used to compare 27 subjects with ASDs (mean age 14.7 years, range 11.4–17.6 years, 20 boys, 7 girls) and 26 control subjects (mean age 14.5 years, range 11.7–17.3 years, 17 boys, 9 girls). Mean fractional anisotropy (FA) image (skeleton) was created and each subject's aligned FA data were then projected onto this skeleton. Voxelwise cross-subject statistics on the skeletonized FA data, mean diffusivity (MD), and measures of diffusion direction were calculated. Importantly, the data were corrected across the whole image instead of using ROI-based methods. Results The ASD group showed significantly greater FA ( P < 0.05, corrected) in the area containing clusters of optic radiation and the right inferior fronto-occipital fasciculus (iFOF). In the same area, λ 3 (representing transverse diffusion) was significantly reduced in the ASD group. No age-related changes were found. Conclusion The results suggest that the reduced transverse diffusion within the iFOF is related to abnormal information flow between the insular salience processing areas and occipital visual areas." @default.
- W2034454761 created "2016-06-24" @default.
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- W2034454761 date "2011-12-01" @default.
- W2034454761 modified "2023-10-18" @default.
- W2034454761 title "White matter in autism spectrum disorders – evidence of impaired fiber formation" @default.
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- W2034454761 doi "https://doi.org/10.1258/ar.2011.110197" @default.
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