Influence of masticatory muscle pain on electromyographic activities of cervical muscles in patients with myogenous temporomandibular disorders

Journal of Oral Rehabilitation - Tập 31 Số 5 - Trang 423-429 - 2004
Ranjith Wasantha Pallegama1, A. W. Ranasinghe2, Vajira S. Weerasinghe3, Mohaideen Sitheeque2
1Department of Basic Sciences
2Department of Oral medicine and Periodontology, Faculty of Dental Sciences
3Department of Physiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka

Tóm tắt

Summary  The present study tested the hypothesis that the resting electromyographic (EMG) activities of sternocleidomastoid and trapezius muscles of myogenous temporomandibular disorder (TMD) patients would be significantly greater than healthy individuals. Eight masticatory muscle pain patients without disc interference disorders (DID) and 30 patients with DID along with 41 matched control subjects were included in the study. The resting EMG activities of sternocleidomastoid and trapezius muscles were recorded with a portable EMG machine. Pain intensities described over the muscles were recorded with a 100 mm visual analogue scale. The two groups of patients had significantly higher resting activities compared with control subjects. Patients (in both groups) who had pain in sternocleidomastoid and trapezius muscles reported significantly higher resting activities in the respective muscles than patients who were free of pain and the controls. The presence of pain over the examined muscles showed significant association with the myogenous TMDs without DID. The observed association of the cervical muscles with myogenous TMDs is expected to be a result of functional link between masticatory and cervical muscles. The present findings suggest that the myogenous TMDs without DID could be a distinct sub‐group that can be a part of broader regional or generalized diseased entity.

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Journal of Oral Rehabilitation

Tập 31 Số 5

423-429

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