AN ELECTROMYOGRAPHIC ANALYSIS OF THE ACTION OF THE BUCCINATOR MUSCLE IN THE NORMAL SUBJECT

Han,  Jang-Sool; Cho,  Han-June; Kim,  Yoo-Sun

J Korean Dent Assoc > Volume 9(1); 1971 > Article

Journal of Korean Dental Association 1971;9(1):59-62.
Published online January 31, 1971.

정상인에 있어서 협근의 작용에 관한 근전도분석

한장술¹, 조한준², 김유선³

^¹서울대학교 치과대학 구강해부학교실
^²서울대학교 치과대학 구강해부학교실
^³서울대학교 치과대학 구강해부학교실

AN ELECTROMYOGRAPHIC ANALYSIS OF THE ACTION OF THE BUCCINATOR MUSCLE IN THE NORMAL SUBJECT

Jang-Sool Han¹, Han-June Cho², Yoo-Sun Kim³

¹Department of Oral Anatomy, College of Dentistry, Seoul National University
²Department of Oral Anatomy, College of Dentistry, Seoul National University
³Department of Oral Anatomy, College of Dentistry, Seoul National University

Abstract

An electromyographic analysis of the buccinator muscle was undertaken, by use of surface electrode. Electromyograms were made from 30 subjects with normal dentition during various oral activity, The results were as follows; 1. No buccinator activity was elicited during slowly opening and closing the mouth. 2. The majority of subjects showed buccinator activity while biting hard, protracting the mandible, and retracting the mandible. 3. The buccinator muscle was found to be markedly and consistently active during swallowing, blowing, sucking and masticating. 4. The buccinator activity during pulling the lips against the teeth was of equal potential with pulling the lips laterally. 5. The buccinator muscle on the working side was more active than the buccinator muscle on the balancing side.