Establishment of Turns-Amplitude Cloud of Normal Adults

J Korean Assoc EMG Electrodiagn Med 2005;7(1):27-33.
Published online May 10, 2005.

Abstract

Objectives: The automatic analysis of the EMG interference pattern reflects motor units induced all range of power. Therefore, comparing to MUAP analysis, it has many advantages including much easier to apply to incorporable patients, minimal errors by practitioners, and faster to obtain results and process informations. The aim of this study is to establish the turns-amplitude clouds of normal adults with using interference pattern. Methods: Healthy adults whose age from 20 to 59 years old participated in this study. The interference patterns were analyzed of the biceps brachi, vastus medialis, and tibialis anterior muscle. The interference patterns were measured at 20 sites in each muscle and turns-mean amplitude was analyzed. With turns/amplitude ratio, normal clouds of gender related turns-amplitude were obtained. Results: The turns amplitude ratio of the biceps brachi, vastus medialis, and tibialis anterior muscle were obtained in male and female. The establishment of normal clouds of gender related -turns-amplitude were obtained. Conclusion: By using normal cloud patterns of turns-amplitude, automatic interference pattern analysis may contribute to diagnose myopathy and neuropathy in incorporable patients.

Key Words: Turns-amplitude, Normal cloud, Interference pattern, Quantitative EMG