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KMID : 0355220130380030261
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Journal of Korean Academy Oral Medicine
2013 Volume.38 No. 3 p.261 ~ p.266
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Surface Electromyographic Characteristics of a Myofascial Trigger Point of the Temporalis Muscle
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Im Yeong-Gwan
Baek Hye-Sung
Lee Guem-Sug
Kim Byung-Gook
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Abstract
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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.
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KEYWORD
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Myofascial pain, Trigger points, Masticatory muscles, Surface electromyography
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