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Diffusion tensor imaging of pyramidal tract reorganization after pediatric stroke
Emilie George1, Linda Heier, Ilhami Kovanlikaya
1Department of Neurosurgery, Weill Cornell Medical College, 525 East 68th Street, Box 99, New York, NY, 10065, USA.
Summary
Pediatric stroke can lead to motor function recovery through brain plasticity. Diffusion tensor imaging (DTI) revealed significant reorganization of the corticospinal tract (CST) in a young child after stroke.
Area of Science:
- Neuroscience
- Neuroimaging
- Pediatric Neurology
Background:
- Developing motor tracts exhibit plasticity, contributing to motor function recovery post-pediatric stroke.
- The corticospinal tract (CST) is crucial for voluntary movement; stroke damage impairs motor function, but pediatric populations show potential for recovery.
- Mechanisms of plastic changes can be functional or structural.
Observation:
- Case study of a 3-year-old girl with extensive left middle cerebral artery (MCA) territory stroke due to head trauma.
- Serial diffusion tensor imaging (DTI) was employed to characterize the reorganization of pyramidal tracts, including the CST.
Findings:
- Diffusion tensor imaging (DTI) demonstrated decreased ipsilesional fractional anisotropy (FA), indicating Wallerian degeneration.
- Increased contralesional fractional anisotropy (FA) suggests compensatory changes in the unaffected hemisphere's corticospinal tract.
Implications:
- The findings support the concept of plastic reorganization within the pyramidal tract following stroke in children.
- Diffusion tensor imaging (DTI) proves to be a valuable tool for identifying and understanding these post-stroke neuroplastic changes.
