2024-03-29T14:02:00Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00007179
2022-12-14T03:54:11Z
461:848:849
Effects of repeated crush injuries on motor functional recovery of the sciatic nerve
Itsubo, Toshiro
Fukushima, Nanae
Kakegawa, Akira
Yokouchi, Kumiko
Kawagishi, Kyutaro
Kato, Hiroyuki
Moriizumi, Tetsuji
Copyright (c) 2012 W. S. Maney & Son Ltd
信州大学博士(医学)・学位論文・平成25年1月30日授与(乙第1153号)・伊坪 敏郎
Objectives: The present study was conducted to examine whether repeated crush injuries have significant effects on motor functional recovery of peripheral nerves. Methods: Repeated crush injuries of the sciatic nerve were inflicted on adult rats at 1-week intervals, and functionality of the sciatic nerve was assessed by the static sciatic index each week for 8 weeks after the final injury. To determine the effects of repeated crush injuries on motor functional recovery of the sciatic nerve, tibialis anterior muscle fibers from single and triple crush injuries were examined, and fiber size and fiber reinnervation during the 2- to 4-week period after the final injury were measured. Results: Compared to single crush injuries, which completely recovered by post-injury week 4, double crush injuries resulted in retarded, but complete recovery by post-injury week 6, whereas triple crush injuries resulted in marked retardation in the regenerative process with incomplete recovery during week 8 of the experimental period. Muscle fiber size for rats with triple crush did not recover to normal range at post-injury week 4, despite its normal size for rats with single crush. The rate of reinnervation increased prominently between post-injury weeks 2 and 3 in both injuries, but the rate with triple crush was lower than that with single crush at post-injury week 3. Discussion: These results, which contradict those of a previous study that reported early functional recovery, indicate that repeated crush injuries inhibit motor functional recovery of the damaged sciatic nerve, as evidenced by delayed and incomplete regeneration, atrophied muscle fibers, and delayed reinnervation.
Article
NEUROLOGICAL RESEARCH. 34(9):908-914 (2012)
MANEY PUBLISHING
2012-11
eng
journal article
AM
http://hdl.handle.net/10091/17660
https://soar-ir.repo.nii.ac.jp/records/7179
https://doi.org/10.1179/1743132812Y.0000000089
10.1179/1743132812Y.0000000089
NEUROLOGICAL RESEARCH
34
9
908
914
https://soar-ir.repo.nii.ac.jp/record/7179/files/H24Otsu1153_Itsubo.pdf
application/pdf
1.3 MB
2015-09-25