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首页> 外文期刊>Journal of orofacial pain. >Alterations in Masticatory Muscle Activation in People with Persistent Neck Pain Despite the Absence of Orofacial Pain or Temporomandibular Disorders
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Alterations in Masticatory Muscle Activation in People with Persistent Neck Pain Despite the Absence of Orofacial Pain or Temporomandibular Disorders

机译：持续性颈痛患者的口咽肌活化变化，尽管没有口面疼痛或颞下颌疾病

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Aim: To assess whether patients with persistent neck pain display evidence of altered masticatory muscle behavior during a jaw-clenching task, despite the absence of orofacial pain or temporomandibular disorders. Methods: Ten subjects with persistent, nonspecific neck pain and 10 age- and sex-matched healthy controls participated. Maximal voluntary contractions (MVCs) of unilateral jaw clenching followed by 5-second submaximal contractions at 10%, 30%, 50%, and 70% MVC were recorded by two flexible force transducers positioned between the first molar teeth. Task performance was quantified by mean distance and offset error from the reference target force as error indices, and standard deviation of force was used as an index of force steadiness. Electromyographic (EMG) activity was recorded bilaterally from the masseter muscle with 13x5 grids of electrodes and from the anterior temporalis with bipolar electrodes. Normalized:EMG root mean square (RMS) was computed for each location of the grid to form a map of the EMG amplitude distribution, and the average normalized RMS was determined forthe bipolar acquisition. Between-group differences were analyzed with the Kruskal Wallis analysis of variance. Results: Task performance was similar in patients and controls. However, patients displayed greater masseter EMG activity bilaterally at higher force levels (P < .05). Conclusion: This study has provided novel evidence of altered motor control of the jaw in people with neck pain despite the absence of orofacial pain or temporomandibular disorders.
机译：目的：评估持续的颈部疼痛患者是否在颌下颌手术期间显示出咀嚼肌行为改变的证据，尽管没有口面部疼痛或颞下颌疾病。方法：十名患有持续性，非特异性颈部疼痛的受试者以及十名年龄和性别相匹配的健康对照者参加。由位于第一磨牙之间的两个柔性力传感器记录了单侧颌骨紧握的最大自愿收缩（MVC），然后是5秒的次最大收缩，分别为10％，30％，50％和70％MVC。任务执行情况通过参考目标力的平均距离和偏移误差作为误差指标进行量化，力的标准偏差用作力稳定性的指标。肌电图（EMG）的活动从双侧记录的13x5电极的咬肌中和双极电极的颞叶前部记录。对网格的每个位置计算归一化：EMG均方根（RMS），以形成EMG振幅分布图，并确定双极采集的平均归一化RMS。组间差异用Kruskal Wallis方差分析进行分析。结果：患者和对照组的任务表现相似。然而，患者在较高的力量水平下双侧表现出更大的咬肌肌电图活动（P <.05）。结论：这项研究提供了新的证据，尽管没有口面疼痛或颞下颌疾病，但颈部疼痛患者的下颌运动控制发生了改变。

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