Durette M R, Rodriquez A A, Agre J C, Silverman J L
Department of Rehabilitation Medicine, University of Wisconsin, Madison 53792.
Am J Phys Med Rehabil. 1991 Jun;70(3):154-6. doi: 10.1097/00002060-199106000-00009.
Several past studies have evaluated the electromyographic activity of myofascial trigger points with conflicting results. This study was performed to determine whether spontaneous activity or motor unit activity was present in patients with focal myofascial pain or fibromyalgia. Using routine needle electromyographic techniques, we sampled reproducibly tender focal areas (tender points), similar tender areas with pain referral (trigger points), associated muscle bands and adjacent uninvolved musculature. Twenty-five subjects (14 females, 11 males, mean +/- SD age 43 +/- 14 years) were studied; twenty-one subjects with focal myofascial pain and four with fibromyalgia. Spontaneous fibrillatory or positive sharp wave potentials were not found in any muscle in the 25 subjects. There was no evidence of focal motor unit activity in the tender points, trigger points or associated muscle bands in either group. Motor unit recruitment was similar in all areas sampled. We conclude that no electrodiagnostic evidence of ongoing denervation or focal muscle spasm is found in association with focal myofascial pain or fibromyalgia.
过去有多项研究评估了肌筋膜触发点的肌电图活动，但结果相互矛盾。本研究旨在确定局灶性肌筋膜疼痛或纤维肌痛患者是否存在自发电活动或运动单位活动。我们使用常规针电极肌电图技术，对可重复出现压痛的局灶区域（压痛点）、有疼痛牵涉的类似压痛区域（触发点）、相关肌束以及相邻未受累肌肉组织进行采样。共研究了25名受试者（14名女性，11名男性，平均年龄±标准差为43±14岁）；其中21名患有局灶性肌筋膜疼痛，4名患有纤维肌痛。在这25名受试者的任何肌肉中均未发现自发电纤维颤动或正锐波电位。两组患者的压痛点、触发点或相关肌束均未发现局灶性运动单位活动的证据。所有采样区域的运动单位募集情况相似。我们得出结论，未发现与局灶性肌筋膜疼痛或纤维肌痛相关的正在进行的失神经支配或局灶性肌肉痉挛的电诊断证据。
