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Related Experiment Video

Updated: May 22, 2026

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging
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Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging

Published on: November 8, 2012

Corticospinal tract mapping in children with ruptured arteriovenous malformations using functionally guided

Michael J Ellis1, James T Rutka, Abhaya V Kulkarni

  • 1Department of Neurosurgery, Hospital for Sick Children, Toronto, Ontario, Canada.

Journal of Neurosurgery. Pediatrics
|May 2, 2012
PubMed
Summary

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Functionally guided diffusion-tensor imaging (DTI) tractography accurately maps corticospinal tracts (CSTs) in children with arteriovenous malformations (AVMs). This technique aids in surgical planning and can help prevent permanent neurological deficits.

Area of Science:

  • Neuroimaging
  • Neurosurgery
  • Pediatric Neurology

Background:

  • Arteriovenous malformations (AVMs) can distort brain anatomy, complicating the precise localization of critical white matter pathways like the corticospinal tract (CST).
  • Accurate CST mapping is crucial for surgical planning to minimize neurological deficits, especially in pediatric patients.

Observation:

  • This study investigated the utility of pretreatment, functionally guided diffusion-tensor imaging (DTI) for CST mapping in three children with ruptured AVMs.
  • Magnetoencephalography and functional MRI identified motor activations, revealing potential cortical reorganization in one patient.
  • Quantitative DTI analysis demonstrated reduced fractional anisotropy and fiber density in CSTs adjacent to AVMs, correlating with motor deficits.

Findings:

  • Functionally guided DTI tractography successfully mapped CSTs in pediatric AVM cases.

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  • Reduced CST integrity (fractional anisotropy, fiber density, caliber) was observed in the affected hemisphere.
  • Preoperative tractography data integrated with intraoperative neuronavigation facilitated AVM resection with no permanent deficits in two patients.

    • Implications:

    • Functionally guided DTI tractography is a feasible technique for mapping CSTs in pediatric ruptured AVMs.
    • This method can aid in surgical risk stratification, prognosis assessment, and multimodal management strategies for pediatric AVMs.
    • Further prospective studies are warranted to fully establish the value of this advanced neuroimaging technique.