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근육의 탈신경후 유리 신경이식에 따른 운동신경종판 재생의 초미세형태학적 연구

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Author(s)
손승원황석영박관규
Keimyung Author(s)
Sohn, Sung WonPark, Kwan Kyu
Department
Dept. of Orthopedic Surgery (정형외과학)
Dept. of Pathology (병리학)
Journal Title
대한정형외과학회지
Issued Date
1993
Volume
28
Issue
2
Keyword
New motor-end plateDenervated muscle
Abstract
In avulsion nerve injuries at the site of the entrance into the muscles, not only loss of muscle function but also nerve repair is impossible because there is no distal stump to approximate with the proximal end. When nerves are implanted directly into normally- innervated muscle a neuromuscular connection is established very rarely. Howerver, motor nerves implanted into denervated muscle consistently establish functionally effective neuromuscular junctions. For ultrastructual study of regeneration of new motor end-plate, the following operative procedure were carried out on separate groups of adult rats. The denervation of the triceps muscle plus simultaneous implantation of the peroneal nerve into the proximal one-third of the denervated muscle were done. At 1, 2, 3, 4, 5 and 8 weeks after operation, the implanted.nerves were dissected form the surrounding tissues from the point of implantation to their origin. The neuromuscular junction of tibial nerve of the contralateral (normal) side was used as control group. On transmission electron microscopy, there was an initial degeneration of the axons and regional disintegration of the myelin sheaths by 1 week after operation. At the same time, a number of Schwann cells enclosing tiny axon sprouts appeared. By 2 weeks postoperatively, the contact of neuromuscular junction and target muscle was identified. From 2 weeks after operation, the beginning of myelination was observed. One month after operation, the large axon-Schwann cell units gradually divided into individual nerve fibers. Eight weeks after operation, many nerve fibers normal in appearance were found. In conclusion, the axonal maturation coincides with the time of formation of the neuromuscular junction in the target muscles. Also, for good result we improved the surgical technique dividing (under operating microscope) the peroneal nerve in fasciculi and inserted them atraumaticully in small slots in the muscle.
Alternative Title
Ultrastructual Study of New Motor End-Plate Following Implantation of Nerve into Denervated Muscle
Keimyung Author(s)(Kor)
손승원
박관규
Publisher
School of Medicine
Citation
손승원 et al. (1993). 근육의 탈신경후 유리 신경이식에 따른 운동신경종판 재생의 초미세형태학적 연구. 대한정형외과학회지, 28(2), 887–894.
Type
Article
ISSN
1226-2102
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/39505
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학)
1. School of Medicine (의과대학) > Dept. of Pathology (병리학)
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