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Japanese

Quantification of Wallerian Degeneration of the Pyramidal Tract in the Capsular Region by Magnetic Resonance Imaging Tetsuji Orita 1 , Tohru Tsurutani 1 , Akifumi Izumihara 1 , Koji Kajiwara 1 , Tokio Matsunaga 2 1Department of Neurosurgery, Shuto General Hospital 2Department of Neurosurgery, Onoda City Hospital Keyword: wallerian degeneration , pyramidal tract , magnetic resonance imaging , cerebrovascular disease pp.645-648
Published Date 1991/7/1
DOI https://doi.org/10.11477/mf.1406900220
  • Abstract
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Using magnetic resonance imaging, we studied 23 patients with motor deficit associated with cere-brovascular disease of the internal capsule. Accord-ing to the severity of the motor deficits, 23 patients were divided into three groups (severe group…9, moderately severe group…8, mild group…6). A coronal T2-weighted image was obtained along a straight line between the front edge of the medulla and the deepest point of the interpeduncular cistern in a midsagittal T1-weighted image. It was revealed that wallerian degeneration extended con-tinuously from part of the internal capsule down to the pons or medulla or the decussation in all patients. The area of wallerian degeneration in the pons and the area of half the pons were calculated from the coronal T2-weighted image. Moreover, the wallerian index was calculated as : (area of wallerian degeneration in pons÷area of half the pons)×100. Values of the wallerian index±SD were 26.4±5.1 in the severe group, 19.2±5.6 in the moderately severe group, and 10.0±5.4 in the mild group. There were significant differences among the three groups. We concluded that the area of wallerian degeneration was related to the severity of motor deficits.


Copyright © 1991, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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