| Pain Evaluation with Surface Electromyography in Temporomandibular Myofascial Pain Dysfunction Syndrome. |
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Ryu, Su Ra , Jung, Sung Hwan , Kim, Jae Hyung , Jang, In Sub , Choi, In Sung , Lee, Sam Gyu |
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Department of Physical Medicine and Rehabilitation, Chonnam National University Medical School, Korea. sam91@jnu.ac.kr |
| 측두하악 근막통 기능이상 증후군에서 표면근전도검사를 이용한 통증평가 |
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류수라, 정성환, 김재형, 장인섭, 최인성, 이삼규 |
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전남대학교 의과대학 재활의학교실 |
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| Abstract |
Objective
To investigate usefulness of surface electromyography (sEMG) for the pain evaluation in the patients with temporomandibular myofascial pain dysfunction syndrome (TM-MPDS).
Method
Twenty unilateral TM-MPDS patients (10 males, 10 females, duration of disease 6.6±5.6 months, age 28.5±3.0 years) and twenty healthy controls (10 males, 10 females, age 30.1±6.2 years) were recruited for this study. The patients were treated with trigger point injection therapy and cryotherapy once a week, and ultrasound thermotherapy four times a week for 2 weeks. Active electrodes were attached on temporalis and masseter muscles with reference electrode on chin and ground electrode on forehead. All of subjects were instructed to clench teeth for 5 seconds after full relaxation. For temporalis and masseter muscles, the amplitudes of clenching-EMG activities were obtained and the mean value of five biting cycles was calculated on both sides. sEMG, visual analog scale (VAS) and asymmetry index (AI) were assessed before and 2 weeks after treatment.
Results
For temporalis and masseter muscles, the amplitudes of affected side-EMG activity significantly decreased, and the AI of the patient group significantly increased compared with those of the control group (p＜0.05, p＜ 0.05). The AI of the patient group significantly decreased after treatment (p＜0.05, p＜0.05). Higher AI in masseter muscle before treatment was significantly correlated with lower VAS after treatment (r=-0.487, p＜0.05).
Conclusion
It is suggested that sEMG would be useful for diagnosing and evaluating the pain in TM-MPDS. (J Korean Acad Rehab Med 2007; 31: 568-573) |
| Key Words:
Electromyography, Temporomandibular joint, Muscle, Dysfunction |
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