Frequency of accessory deep peroneal nerve: electrophysiological study (original) (raw)

Abstract

Background and aims: Reinnervation after peripheral nerve injuries implies abnormal branching of regenerating axons, modification of the original distribution of muscle innervation and compensatory activity in neighbouring nerves. These may lead to an abnormal function in muscles that require fine motor control, such as sphincters. We investigated if external anal sphincter (EAS) dysfunction leading to incontinence was related to pudendal nerve rein-nervation abnormalities. Methods: In 10 patients with fecal incontinence and 3 controls , we applied focal electrical stimuli with a monopolar needle inserted into one side and recorded responses in the other side. We hypothesized that the size of the contralate-ral responses would be an indirect measure of the amount of abnormal contralateral reinnervation. We also recorded EAS needle EMG activity and pudendal nerve latency. Results: 8 patients had abnormal needle EMG findings (denervation or significant jitter/blocking). Mean pudendal ...

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