Gender Differences in Pressure Pain Thresholds during Sustained Jaw Muscle Contraction
김철, 김지락, 정진우,
소속 상세정보
김철 ( Kim Cheul ) - Gangneung-Wonju National University College of Dentistry Department of Oral Medicine and Diagnosis
김지락 ( Kim Ji-Rak ) - Seoul National University School of Dentistry Department of Oral Medicine and Oral Diagnosis
정진우 ( Chung Jin-Woo ) - Seoul National University School of Dentistry Department of Oral Medicine and Oral Diagnosis
KMID : 0355220140390040146
Abstract
Purpose: To determine whether a fatiguing clench significantly affects the changes in pressure pain threshold (PPT) in men compared to women.
Methods: The changes of PPTs from before to after a sustained clench in 12 men and 12 women were obtained. We used a decrease in median frequencies of surface electromyography (EMG) power spectra from the start to the end of the sustained clench as evidence of fatigue. Endurance time for the clench was used as a covariate.
Results: The median frequencies decreased after the clench in both the anterior temporalis and masseter muscles, did not differ with the muscle or the gender of the subjects, and none of the interaction terms were significant. The PPTs were lower for women for both muscles, were decreased after the sustained clench, but failed to show the hypothesized gender by time interaction.
Conclusions: Our results show that women have lower PPTs than men, but do not respond differently than men to jaw muscle fatigue.
키워드
Electromyography; Masseter muscle; Power spectrum; Pressure pain threshold; Temporalis muscle
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