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Rehabilitation Practice and Science

Translated Title

記錄電極間距對感覺神經電位的影響

Abstract

The value of sensory nerve action potential depends on a well-defined interelectrode distance, although there is no uniformity about the optimal recording montage in the published literature. The purpose of this investigation was to quantify the effect of different interelectrode distance upon amplitude, duration, surface area, and onset latency of the sensory nerve action potential (SNAP) obtained by the antidromic method. In 30 healthy subjects, the sensory nerve action potentials from the sural nerve of right lower limb were recorded with the active recording electrode posterior to the lateral malleolus and the reference electrode placed 1 cm, 2 cm, 3 cm, 4 cm, 5 cm, 6 cm, 7 cm, and 8 cm distally and longitudinally. With various interelectrode distances, there were singificant differences in the amplitude, duration, surface area, onset latency, and the shape of sensory nerve action poten tials. The duration of SNAPs was prolonged when the interelectrode distance was increased by centimeter. The surface area, amplitude, onset latency of SNAP were the smallest with the reference electrode placed 1 cm distal to the active recording electrode. The appropriate range of the interelectrode distance was between 3 and 6 cm. The largest amplitude was obtained with the 4 cm interelectrode separation.

Language

Traditional Chinese

First Page

15

Last Page

20

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