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자료유형
학술저널
저자정보
저널정보
대한임상신경생리학회 Annals of Clinical Neurophysiology Annals of Clinical Neurophysiology 제6권 제1호
발행연도
2004.1
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31 - 34 (4page)

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B a c k g r o u n d s: The pathway of the sural nerve (SN) is variable, but usually divided into medial and lateral sural branches joining the posterior tibial nerve (PTN) and the peroneal nerve (PN). The sural nerve may be affected by PN palsy. The frequency or the severity of SN involvement in peroneal palsy is not known. The purpose of the study is to investigate the frequency and the severity of the SN involvement by the peroneal nerve palsy. Methods: Total 85 patients were included with peroneal palsy. Amplitudes of distal peroneal, sural, and superficial peroneal nerves (SPN) were compared between normal and paralyzed sides. The frequency and severity of SN involvement by peroneal palsy were investigated. Results: Mean age was 48.4±17.4 years old at the time of the test. Peroneal palsy was right side in 32, left in 38, and bilateral in 15 patients. Mean amplitudes of affected distal PN, SPN, and SN were 1.51±1.64 mV, 3.50±4.86 μV, and 10.42±6.59 μV in right side, and 1.19±1.57 mV, 4.38±5.67μV, and 11.06±6.87μV in left side, respectively. Sensory nerve action potential (SNAP) amplitude of the SN in the affected side was average 73.7±33.1% of normal, which was significantly lower than that in the normal side(p<0.01). The decrease of the sural SNAP amplitude was more than 15% in 39 out of 70 patients with unilateral peroneal palsy. Peroneal compound muscle action potential (CMAP) amplitude was not correlated with the amplitude of the sural SNAP. By complete peroneal palsy, SN SNAP amplitude was decreased to 4% of SNAP and 57.7±31.8% of that in normal side. Conclusions: PN injury without PTN involvement may induce reduction of sural SNAP amplitude. Because of the anatomic variation of SN, the electrophysiological findings are variable. It should be considered to interpret the location of the PN lesion.

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