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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

Developmental coordination disorder: a pilot diffusion tensor imaging study.

Jill G Zwicker¹, Cheryl Missiuna, Susan R Harris

¹Graduate Program in Rehabilitation Sciences, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada. jzwicker@cw.bc.ca

Pediatric Neurology

|February 23, 2012

Summary

This summary is machine-generated.

Children with developmental coordination disorder show reduced axial diffusivity in motor and sensory brain tracts. This finding suggests potential microstructural brain differences may underlie motor deficits in this condition.

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Area of Science:

Neuroscience
Developmental Psychology
Radiology

Background:

Developmental coordination disorder (DCD) presents motor deficits not linked to gross brain abnormalities.
Subtle differences in brain microstructure are hypothesized to contribute to DCD.

Purpose of the Study:

To investigate the integrity of white matter tracts in children with and without DCD.
To explore microstructural differences in motor, sensory, and cerebellar pathways using diffusion tensor imaging.

Main Methods:

Diffusion tensor imaging (DTI) was used to measure fractional anisotropy and diffusivity.
Key pathways examined included the corticospinal tract, posterior thalamic radiation, and cerebellar peduncles.
Participants were children aged 8-12 years, with and without DCD.

Main Results:

No significant differences in fractional anisotropy or cerebellar peduncle diffusion parameters were found between groups.
Children with DCD exhibited lower mean diffusivity in the corticospinal tract and posterior thalamic radiation.
Lower axial diffusivity in these tracts correlated significantly with motor impairment scores.

Conclusions:

Reduced axial diffusivity in motor and sensory tracts may be implicated in the pathophysiology of DCD.
These findings suggest potential white matter microstructural alterations in DCD.
Further research with larger cohorts is recommended for confirmation.