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Updated: Jun 22, 2026

Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging

Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging

Published on: September 12, 2011

Diffusion tensor imaging findings in school-aged autistic children.

Adriana Rocha Brito¹, Marcio Moacyr Vasconcelos, Romeu Cortes Domingues

¹Departamento Materno-Infantil, Hospital Universitário Antônio Pedro, Universidade Federal Fluminense, Niterói, RJ, Brazil.

Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging

|June 4, 2009

Summary

This summary is machine-generated.

Diffusion tensor imaging revealed reduced white matter integrity in autistic children, particularly in the corpus callosum and internal capsule. These findings suggest impaired brain connectivity in autism spectrum disorder.

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Area of Science:

Neuroimaging
Developmental Neuroscience
Autism Spectrum Disorder Research

Background:

Autism spectrum disorder (ASD) is a complex neurodevelopmental condition.
White matter microstructure alterations have been implicated in ASD pathophysiology.
Diffusion tensor imaging (DTI) is a valuable tool for assessing white matter integrity.

Purpose of the Study:

To compare cerebral white matter tracts using DTI in children with and without autism.
To identify specific white matter regions affected in autistic children.

Main Methods:

A case-control study involving 8 autistic and 8 neurotypical male children (ages 8-11).
1.5-T MRI scans were acquired to perform DTI.
Fractional anisotropy (FA) values were calculated for various white matter tracts, including the corpus callosum, internal capsule, and cerebellar peduncles.

Main Results:

Autistic children showed significantly reduced FA in the anterior corpus callosum.
Significant FA reductions were observed in the right corticospinal tract and bilateral internal capsules.
Impaired white matter integrity was also noted in the superior and middle cerebellar peduncles of autistic children.

Conclusions:

DTI findings suggest compromised white matter microstructure in children with autism.
Reduced FA in specific tracts indicates potential disruptions in neural connectivity.
These microstructural abnormalities may contribute to the neurobiological underpinnings of autism spectrum disorder.