成年猫神经损伤后传入和传出纤维向肌梭的再生
Regeneration of afferent and efferent fibres to muscle spindles after nerve injury in adults cats.
作者信息
Brown M C, Butler R G
出版信息
J Physiol. 1976 Sep;260(2):253-66. doi: 10.1113/jphysiol.1976.sp011514.
Abstract
- The nerves to cat peroneus longus and tenuissimus muscles were either cut or crushed close to the muscle and the afferent and efferent nerve supply to the muscle spindles was studied electrophysiologically between 2 and 32 weeks later. 2. Recovery was more rapid and complete after crush than section for both afferent and efferent fibres. After recovery from either procedure normal primary and secondary afferents and static and dynamic gamma efferent fibres were found. 3. Some abnormally occurring neurones were found. One group consisted of beta fibres which had a static action on muscle spindles. Static beta fibres are very rarely found in normal muscles. 4. The results indicate that some guidance mechanism exists which after crush injuries of nerves may restore muscle receptor function almost to normal. Even after nerve section some muscle spindles may become correctly reinnervated.
摘要
- 切断或挤压猫的腓骨长肌和腓骨短肌的神经，使其靠近肌肉，在2至32周后用电生理学方法研究肌肉梭的传入和传出神经供应。2. 对于传入和传出纤维，挤压后的恢复比切断后更快且更完全。从这两种手术恢复后，均发现了正常的初级和次级传入纤维以及静态和动态γ传出纤维。3. 发现了一些异常出现的神经元。一组由对肌肉梭有静态作用的β纤维组成。静态β纤维在正常肌肉中很少见。4. 结果表明，存在某种引导机制，在神经挤压伤后可使肌肉感受器功能几乎恢复正常。即使在神经切断后，一些肌肉梭也可能重新获得正确的神经支配。
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