MULTICHANNEL s-EMG SYSTEM OF MASTICATORY MUSCLES: DESIGN AND CLINICAL APPLICATION IN DIAGNOSIS OF DYSFUNCTION IN STOMATOGNATHIC SYSTEM

摘要

To develop a more convenient electromyography (EMG) signal acquisition system for masticatory muscles (MMs) will have implication for the diagnosis of disease of stomatological system and functional reconstruction in dentistry. This study attempted to design a multi-channel MM surface electromyography (s-EMG) signal acquisition system which has high common mode rejection ratio (CMRR) and preamplifier system. In this system, a USB graphical interface technology on windows operating system was specifically designed and s-EMG data were analyzed by a combination of time domain, frequency domain, time-frequency, several spectral analysis, wavelets and other special algorithms under multi-parameter. Then the EMG data from some patients with stomatological dysfunction in temporomandibular joint (TMJ) clinic and a control group from dental school students were acquired and analyzed. The data indicate that the s-EMG signal acquisition system which has been built is simple and useful in aiding diagnosis and treatment evaluation of temporomandibular disorders.