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Abstract：
Background and Objectives: No studies have reported corrugator muscle activity associated with pain in people with pain. This study aimed to develop an objective pain assessment method using corrugator muscle activity with pressure pain stimulation to the skeletal muscle. Methods: Participants were 20 adults (a mean ± SD age of 22.0 ± 3.1 years) with chronic neck/shoulder pain. Surface electromyography (sEMG) of corrugator muscle activity at rest (baseline) and without and with pressure pain stimulation applied to the most painful tender point in the shoulder was recorded. Participants evaluated the intensity of the neck/shoulder pain and the sensory and affective components of pain with pressure stimulation using a visual analogue scale (VAS). The percentages of integrated sEMG (% corrugator activity) without and with pressure pain stimulation to the baseline integrated sEMG were compared, and the relationships between the % corrugator activity and the sensory and affective components of pain VAS scores were evaluated. Results: Without pressure stimulation, an increase in corrugator muscle activity due to chronic neck/shoulder pain was not observed. The % corrugator activity with pressure pain stimulation was significantly higher than that without stimulation (p < 0.01). A significant positive correlation between corrugator muscle activity and the affective components of pain VAS scores with pressure stimulation was found (ρ = 0.465, p = 0.039) and a tendency of positive correlation was found for the sensory component of pain VAS scores (ρ = 0.423, p = 0.063). Conclusions: The increase in corrugator muscle activity with pressure pain stimulation to the tender point in adults with chronic neck/shoulder pain was observed, although increased corrugator muscle activity resulting from the chronic neck/shoulder pain was not. These findings suggest that corrugator muscle activity with pressure pain stimulation can be a useful objective indication for tender point sensitivity assessment in the skeletal muscle with pain.
摘要：
背景和目的：没有研究报道与疼痛患者疼痛相关的皱褶肌肉活动。这项研究旨在开发一种客观的疼痛评估方法，该方法使用瓦楞肌活动对骨骼肌进行压力疼痛刺激。方法：参与者是20名患有慢性颈/肩痛的成年人（平均±SD年龄为22.0±3.1岁）。记录了在休息时（基线）以及在没有和有压力疼痛刺激的情况下对肩部最疼痛的压痛点施加的皱褶肌肉活动的表面肌电图（sEMG）。参与者使用视觉模拟量表（VAS）评估了颈部/肩部疼痛的强度以及压力刺激下疼痛的感觉和情感成分。比较了无压力疼痛刺激和有压力疼痛刺激的综合sEMG的百分比（％波纹器活动）与基线综合sEMG的百分比，并评估了波纹器活动百分比与疼痛VAS评分的感觉和情感成分之间的关系。结果:无压力刺激,未观察到由于慢性颈/肩痛引起的皱褶肌活动增加。有压力疼痛刺激的瓦楞机活动%显著高于无刺激的%(p<0.01)。发现皱褶肌活动与疼痛VAS评分与压力刺激的情感成分之间存在显着正相关（ρ=0.465，p=0.039），并且发现疼痛VAS评分的感觉成分呈正相关趋势（ρ=0.423，p=0.063）。结论：在患有慢性颈/肩痛的成年人中，观察到随着压力疼痛刺激到压痛点的皱褶肌肉活动增加，尽管慢性颈/肩痛导致的皱褶肌肉活动没有增加。这些发现表明，压痛刺激下的瓦楞肌活动可能是评估疼痛骨骼肌压痛点敏感性的有用客观指标。
