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- W4386897404 abstract "ABSTRACTBackground The polarity of nerve grafts does not interfere with axon growth. Our goal was to investigate whether axons can regenerate in a retrograde fashion within sensory pathways and then extend into motor pathways, leading to muscle reinnervation.Methods Fifty-four rats were randomized into four groups. In Group 1, the ulnar nerve was connected end-to-end to the superficial radial nerve after neurectomy of the radial nerve in the axilla. In Group 2, the ulnar nerve was connected end-to-end to the radial nerve distal to the humerus; the radial nerve then was divided in the axilla. In Group 3, the radial nerve was divided in the axilla, but no nerve reconstruction was performed. In Group 4, the radial nerve was crushed in the axilla. Over 6 months, we behaviorally assessed the recovery of toe spread in the right operated-upon forepaw by lifting the rat by its tail and lowering it onto a flat surface. Six months after surgery, rats underwent reoperation, nerve transfers were tested electrophysiologically, and the posterior interosseous nerve (PIN) was removed for histological evaluation.Results Rats in the crush group recovered toe spread between 5 and 8 days after surgery. Rats with nerve transfers demonstrated electrophysiological and histological findings of nerve regeneration but no behavioral recovery.Conclusions Ulnar nerve axons regrew into the superficial radial nerve and then into the PIN to reinnervate the extensor digitorum communis. We were unable to demonstrate behavioral recovery because rats cannot readapt to cross-nerve transfer.KEYWORDS: Nerve graftretrograde nerve regenerationnerve transfermuscle reinnervationnerve regenerationnerve repair Disclosure statementAll the named authors hereby declare that they have no conflicts of interest to disclose. This research was not funded by any grant from any funding agency in the public, commercial, or non-profit sectors.Additional informationFundingThe authors reported there is no funding associated with the work featured in this article." @default.
- W4386897404 created "2023-09-21" @default.
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- W4386897404 date "2023-09-20" @default.
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- W4386897404 title "Retrograde peripheral nerve regeneration from sensory to motor pathways in rats: a new experimental concept in nerve repair" @default.
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- W4386897404 doi "https://doi.org/10.1080/01616412.2023.2258039" @default.
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