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Rehabilitation Practice and Science

Translated Title

國人副深腓神經之電學診斷探討

Abstract

The accessory deep peroneal nerve is a common anatomical variation in innervating the extensor digitorum brevis (EDB) muscle of the foot. Awareness of this anomaly is important in electrodiagnostic study of peroneal nerve lesions. One hundred healthy Taiwanese, including 50 men and 50 women, were tested for the presence of an accessory deep peroneal nerve by an electrodiagnostic method. The presence of a visible EDB twitch and an amplitude of the evoked muscle action potential of 0.2 mV or greater upon stimulation of the accessory deep peroneal nerve were taken as positive findings. This study showed that the EDB is at least partially innervated by the accessory deep peroneal nerve in 23 of 100 individuals tested (5 of them bilaterally) and there was no significant difference between men and women or right and left legs. Extension of the fourth or especially the fifth toe was the most frequent response to the stimulation of the accessory deep peroneal nerve. We feel the presence of an accessory deep peroneal nerve is based on demonstration of a larger amplitude of the evoked potential when this nerve is stimulated at the knee than when stimulated at the ankle. We found that the sensitivity and specificity of this diagnostic criterion were 0.54 and 0.93, respectively. Because of a high incidence of an accessory deep peroneal nerve and to avoid error, we suggest that this nerve should be studied as a routine procedure during electrodiagnostic study in patients with injured peroneal nerves.

Language

Traditional Chinese

First Page

23

Last Page

27

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