The Journal of the Korean dental association (대한치과의사협회지)

The Korean Dental Association (대한치과의사협회)
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AN ELECTROMYOGRAPHIC ANALYSIS OF THE ACTION OF THE BUCCINATOR MUSCLE IN THE NORMAL SUBJECT

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  • Han, Jang-Sool (Department of Oral Anatomy, College of Dentistry, Seoul National University) ;
  • Cho, Han-June (Department of Oral Anatomy, College of Dentistry, Seoul National University) ;
  • Kim, Yoo-Sun (Department of Oral Anatomy, College of Dentistry, Seoul National University)
  • 한장술 (서울대학교 치과대학 구강해부학교실) ;
  • 조한준 (서울대학교 치과대학 구강해부학교실) ;
  • 김유선 (서울대학교 치과대학 구강해부학교실)
  • Published : 1971.01.30
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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.

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