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Automated Tractography Settings for Assessing the Corticoreticular Pathway in Patients With Stroke: A Clinical
Tetsuo Koyama1, Midori Mochizuki1, Yuki Uchiyama2
1Department of Rehabilitation Medicine, Nishinomiya Kyoritsu Neurosurgical Hospital, Nishinomiya, JPN.
Cureus
|June 29, 2026
Summary
This study introduces an automated method to assess the corticoreticular pathway (CRP) in stroke patients, revealing reduced white matter integrity in both CRP and corticospinal tract (CST) pathways post-stroke.
Area of Science:
- Neuroimaging
- White Matter Tractography
- Stroke Rehabilitation
Background:
- The corticoreticular pathway (CRP) is crucial for motor recovery after stroke.
- Current automated tractography methods often exclude the CRP, hindering clinical use.
- This study addresses the need for reproducible CRP assessment in stroke patients.
Purpose of the Study:
- To integrate CRP assessment into an automated tractography pipeline.
- To evaluate the feasibility of this automated approach in mild stroke patients.
- To compare white matter integrity between lesioned and non-lesioned hemispheres.
Main Methods:
- Retrospective analysis of mild ischemic stroke patients.
- Diffusion tensor imaging (DTI) and automated tractography (CST & CRP).
- Quantification of tract volume, fractional anisotropy (FA), and hemisphere comparison.
Main Results:
- Automated tractography successfully reconstructed both CST and CRP in all patients.
- CRP volume was variable but often larger than CST volume.
- Significantly lower FA values were observed in the lesioned hemisphere for both CST and CRP.
Conclusions:
- Anatomically guided automated tractography enables reliable CRP reconstruction.
- This method provides a practical tool for evaluating motor pathways post-stroke.
- Facilitates future research in stroke rehabilitation and neuroplasticity.
