Journal of Oral Medicine and Pain

Korean Academy of Orofacial Pain and Oral Medicine (대한안면통증구강내과학회)
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Surface Electromyographic Characteristics of a Myofascial Trigger Point of the Temporalis Muscle: A Case Report

측두근의 근막동통 발통점의 표면 근전도 특성: 증례 보고

  • Im, Yeong-Gwan (Department of Oral Medicine, Chonnam National University Dental Hospital) ;
  • Baek, Hey-Sung (Department of Pediatrics, Hallym University Kangdong Sacred Heart Hospital, Hallym University College of Medicine) ;
  • Lee, Guem-Sug (Department of Dentistry, Chonnam National University Hwasun Hospital) ;
  • Kim, Byung-Gook (Department of Oral Medicine, School of Dentistry, Chonnam National University)
  • 임영관 (전남대학교치과병원 구강내과) ;
  • 백혜성 (한림대학교 강동성심병원 소아청소년과) ;
  • 이금숙 (화순전남대학교병원 치과) ;
  • 김병국 (전남대학교 치의학전문대학원 구강내과학교실)
  • Received : 2013.07.27
  • Accepted : 2013.09.05
  • Published : 2013.09.30
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Abstract

Myofascial pain is a condition associated with regional pain and muscle tenderness characterized by the presence of myofascial trigger points. In this case report, a subject complaining of nighttime bruxism was clinically assessed, and a latent trigger point of the anterior temporalis muscle was identified with manual palpation. A surface electromyographic (SEMG) exam of the anterior temporalis muscle harboring the latent trigger point demonstrated several SEMG features, including post-contraction irritability, delayed relaxation following contraction and accelerated muscle fatigue. It was concluded that a SEMG exam may detect abnormal masticatory muscle function and, therefore, assist in the evaluation of myogenous temporomandibular disorders.

근막동통은 국소적인 통증과 촉진시 근 압통을 보이면서 근막 발통점이 존재하는 것이 특징인 근육질환이다. 본 증례에서는 야간 이갈이를 호소하는 환자의 임상검사에서 촉진을 통해 측두근 전방 부위의 잠재성 발통점을 확인하였고, 양측의 측두근과 교근에 대해 표면 근전도 검사를 시행한 결과, 이환된 측두근에서 수축 후 근과민성, 이완 지연 및 근피로 가속과 같은 소견을 얻을 수 있었다. 표면근전도 검사는 저작근의 비정상적인 기능을 확인할 수 있으므로 근육성 측두하악장애의 평가에 도움이 될 수 있다.

Keywords

References

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