參考電極對運動單元電位波參數之影響：同軸與單極針極記錄之定量比較

Influence of Reference Electrode to Motor Unit Potential Parameters: Ouantitative Comparison between Monopolar and Concentric Needles

詹瑞棋(Rai-Chi Chan) ； 徐道昌(Tao-Chang Hsu)

《中華民國復健醫學會雜誌》 15期 (1987/12) Pp. 39-43

https://doi.org/10.6315/JRMA.198712.0039

摘要

本文的目在於以定量的方法比較參考電極的變動對於運動單元電位波各項參數之影響。以正常人小腿脛前肌為測試對象，同軸針極刺入肌肉中，用電腦及肌電圖作運動單元電位波各項參數之線上分析，以求得該運動單元電位波之振幅、間期、表面積、相數、轉折數等。再將主記錄電極的訊號經由特製的分流線傳至另一套電腦與肌電圖機，對同一運動單元電位波作相同次的線上分析，但是以表面電極作參考電極。收集200組運動單元位電位波參數之後，作單向變異數分析及配對t試驗，統計結果發現以相同的針極記錄面積但是不同的參考電極方式作測試時，單極針極的記錄方式在間期及表面積兩項參比同軸針極有明顯增加，而且有統計學上之差異性；而振幅、相數及轉折數則沒有差異性，本文並探討造成這些差異的成因。

並列摘要

The purpose of this study was to determine the influence of the reference electrode to the motor unit action potential parameters including amplitude, duration, surface area, phases and turns by reading the same recording area by monopolar and cocentric needles. A concentric needle was stuck into the subject's anterior tibialis muscle, online motor unit analysis was done by EMG-computer combinations. The sinal from the active recording electrode was shunted to another EMG-computer set for analysis of the same motor unit by adding a surface electrode as a reference electrode (monopolar needle recording pattern). After collecting 200 motor unit potentials, data analysis of five parameters were made for comparison. Significant differences in duration and surface area were found, but not in amplitude, turns and phases. Factors contributing to the results are discussed.

並列關鍵字

concentric needle ； monopolar needle ； motor unit potential