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Conditioning Electrical Stimulation Accelerates Regeneration in Nerve Transfers

神经再支配 医学 胫骨前肌 胫神经 腓总神经 神经外膜修复 再生(生物学) 瓦勒氏变性 刺激 坐骨神经 脚踝 解剖 麻醉 外科 骨骼肌 生物 内科学 细胞生物学
作者
Jenna‐Lynn Senger,Karyne N. Rabey,Michael Morhart,K. Ming Chan,Christine A. Webber
出处
期刊:Annals of Neurology [Wiley]
卷期号:88 (2): 363-374 被引量:18
标识
DOI:10.1002/ana.25796
摘要

Objective Compared to the upper limb, lower limb distal nerve transfer (DNT) outcomes are poor, likely due to the longer length of regeneration required. DNT surgery to treat foot drop entails rerouting a tibial nerve branch to the denervated common fibular nerve stump to reinnervate the tibialis anterior muscle for ankle dorsiflexion. Conditioning electrical stimulation (CES) prior to nerve repair surgery accelerates nerve regeneration and promotes sensorimotor recovery. We hypothesize that CES prior to DNT will promote nerve regeneration to restore ankle dorsiflexion. Methods One week following common fibular nerve crush, CES was delivered to the tibial nerve in half the animals, and at 2 weeks, all animals received a DNT. To investigate the effects of CES on nerve regeneration, a series of kinetic, kinematic, skilled locomotion, electrophysiologic, and immunohistochemical outcomes were assessed. The effects of CES on the nerve were investigated. Results CES‐treated animals had significantly accelerated nerve regeneration ( p < 0.001), increased walking speed, and improved skilled locomotion. The injured limb had greater vertical peak forces, with improved duty factor, near‐complete recovery of braking, propulsive forces, and dorsiflexion ( p < 0.01). Reinnervation of the tibialis anterior muscle was confirmed with nerve conduction studies and immunohistochemical analysis of the neuromuscular junction. Immunohistochemistry demonstrated that CES does not induce Wallerian degeneration, nor does it cause macrophage infiltration of the distal tibial nerve. Interpretation Tibial nerve CES prior to DNT significantly improved functional recovery of the common fibular nerve and its muscle targets without inducing injury to the donor nerve. ANN NEUROL 2020;88:363–374.
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