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DTI of the Visual Pathway - White Matter Tracts and Cerebral Lesions
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Sensitive diffusion tensor imaging quantification method to identify language pathway abnormalities in children with

Sai Prasad Gopal1, Vijay Narayan Tiwari, Amy L Veenstra

  • 1Department of Pediatrics and Neurology, Wayne State University School of Medicine, Detroit, MI, USA.

The Journal of Pediatrics
|August 16, 2011
PubMed
Summary
This summary is machine-generated.

The anteroposterior/mediolateral (AP/ML) fiber ratio in the perisylvian region is a sensitive indicator of white matter abnormalities in children with developmental delay (DD). This quantitative method aids in demonstrating language pathway issues in pediatric patients.

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Area of Science:

  • Neuroimaging
  • Developmental Neuroscience
  • Pediatric Neurology

Background:

  • Developmental delay (DD) often involves atypical white matter development.
  • Identifying sensitive quantitative markers for language pathway abnormalities is crucial for early diagnosis and intervention.

Purpose of the Study:

  • To evaluate the anteroposterior/mediolateral (AP/ML) fiber ratio in the perisylvian region as a sensitive quantitative marker for white matter abnormalities in children with DD.
  • To compare the efficacy of the AP/ML ratio with traditional tractography in characterizing these abnormalities.

Main Methods:

  • Diffusion tensor imaging (DTI) was performed on 15 children with DD and 15 typically developing (TD) controls.
  • Fraction of fibers oriented in anteroposterior (AP) and mediolateral (ML) directions within the perisylvian region were quantified using DTI color-coded orientation maps.
  • The AP/ML ratio was calculated and compared between groups.

Main Results:

  • The AP/ML ratio was more sensitive than tractography for detecting perisylvian abnormalities in children with DD.
  • Children with DD showed a significantly lower AP/ML ratio in the left perisylvian region (P = .03) and significantly higher ML component in bilateral perisylvian regions (P = .01 [left], P = .004 [right]) compared to TD controls.
  • A significant negative correlation was found between the left ML component and Vineland communication skills (r = -0.657, P = .011).

Conclusions:

  • The AP/ML ratio serves as a sensitive and quantitative indicator of regional white matter architectural abnormalities in the perisylvian region of children with DD.
  • This DTI-derived metric offers a promising approach for assessing language pathway integrity in pediatric developmental disorders.