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Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging
Published on: November 8, 2012
Characterizing White Matter Tract Organization in Polymicrogyria and Lissencephaly: A Multifiber Diffusion MRI
F Arrigoni1, D Peruzzo2, S Mandelstam3,4,5,6
1From the Scientific Institute, IRCCS E. Medea (F.A., D.P., G.A., D.R., R.R.), Bosisio Parini, Italy filippo.arrigoni@lanostrafamiglia.it.
This study reveals significant white matter tract abnormalities in polymicrogyria and lissencephaly patients. Lissencephaly showed more widespread tract issues than polymicrogyria, with patterns linked to specific subtypes and causes.
Area of Science:
- Neuroimaging
- Developmental Neuroscience
- Neurology
Background:
- Polymicrogyria and lissencephaly are brain malformations often involving white matter.
- White matter tract organization in these conditions is understudied.
Purpose of the Study:
- To characterize white matter tract organization in polymicrogyria and lissencephaly.
- To utilize advanced diffusion MRI techniques for tractography.
Main Methods:
- Retrospective review of 50 patients with polymicrogyria or lissencephaly.
- Constrained spherical deconvolution for white matter tractography.
- Visual comparison of reconstructed tracts with healthy controls.
Main Results:
- Lissencephaly patients (79.2%) showed more white matter tract abnormalities than polymicrogyria patients (37.3%).
- All white matter tracts were affected in lissencephaly; cingulum and superior longitudinal fasciculus were frequently affected in polymicrogyria.
- Abnormality severity correlated with polymicrogyria extent and distribution.
Conclusions:
- White matter tract structural abnormalities are common in polymicrogyria and lissencephaly.
- Tract involvement patterns correlate with specific disease subtypes and potentially their etiologies.
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