Hübscher Markus, Tu Simon, Stanton Tasha, Moseley G Lorimer, Wand Benedict M, Booth John, McAuley James H
Neuroscience Research Australia, PO Box 1165, Randwick, NSW, 2031, Australia,
Eur J Appl Physiol. 2015 May;115(5):1047-55. doi: 10.1007/s00421-014-3085-5. Epub 2014 Dec 24.
Movement restriction has been proposed as an important modulator of changes in sensory and perceptual function and motor imagery performance that are observed in musculoskeletal pain syndromes. There are no empirical data to support this view.
The primary objective of this experiment was to determine the effects of movement restriction on local and widespread sensory, perceptual and motor imagery changes after exercise-induced muscular pain. Further objectives were to investigate whether changes in sensory perception are correlated with pain intensity and tactile acuity or motor imagery performance.
In forty healthy volunteers, delayed onset muscle soreness (DOMS) of the non-dominant elbow flexors was induced using eccentric contractions until exhaustion. Participants were then randomised into two groups: a movement restriction group (wearing a sling) or a control group (not wearing a sling). Sensory and perceptual functions were measured using a range of sensory tests and a motor imagery performance task (left/right limb judgements).
Movement restriction did not modulate any of the measures. We found concurrent mechanical hypoesthesia (p < 0.01), reduced tactile acuity (p = 0.02) and pressure hyperalgesia (p < 0.01) at the painful side. We found evidence of widespread pressure hyperalgesia. Impaired tactile acuity was associated with a decrease in pain threshold to pressure (r = -0.34, p = 0.03). Motor imagery performance was unchanged (p > 0.35) by pain or movement restriction.
Short-term movement restriction did not influence local and widespread sensory changes induced by experimentally induced muscular pain.
运动受限被认为是肌肉骨骼疼痛综合征中观察到的感觉和知觉功能变化以及运动想象表现变化的重要调节因素。但尚无实证数据支持这一观点。
本实验的主要目的是确定运动受限对运动诱导性肌肉疼痛后局部和广泛的感觉、知觉及运动想象变化的影响。进一步的目的是研究感觉知觉的变化是否与疼痛强度、触觉敏锐度或运动想象表现相关。
在40名健康志愿者中，通过离心收缩诱导非优势侧肘屈肌延迟性肌肉酸痛（DOMS）直至疲劳。然后将参与者随机分为两组：运动受限组（佩戴吊带）或对照组（不佩戴吊带）。使用一系列感觉测试和运动想象表现任务（左右肢体判断）测量感觉和知觉功能。
运动受限并未调节任何测量指标。我们发现疼痛侧同时存在机械性感觉减退（p < 0.01）、触觉敏锐度降低（p = 0.02）和压力性痛觉过敏（p < 0.01）。我们发现存在广泛压力性痛觉过敏的证据。触觉敏锐度受损与压力疼痛阈值降低相关（r = -0.34，p = 0.03）。疼痛或运动受限对运动想象表现无影响（p > 0.35）。
短期运动受限并未影响实验诱导性肌肉疼痛引起 的局部和广泛感觉变化。
