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Effects of manipulative therapy on the longissimus dorsi in the equine back

机译：手法治疗对马背背最长肌的影响

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摘要

Pain, atrophy and dysfunction of the longissimus dorsi in the equine back can lead to poor performance and altered biomechanics. Back problems are often treated by manipulative therapy to this muscle. The purpose of this study was to identify if manipulative therapy resulted in changes to muscle tone or electromyographic (EMG) activity immediately after treatment. We measured the muscle tone during standing using a mechanical tissue indenter and the EMG activity (both at the T16 level in the longissimus dorsi) during walking around a figure-of-eight course in 26 horses. The horses were randomly assigned into three groups that received: (a) spinal (McTimoney) manipulations, (b) reflex inhibition therapy or (c) a control group that was not manipulated. The muscle tone and activity were measured immediately after treatment. Both the McTimoney and the reflex inhibition groups showed significant decreases in muscle tone (c. 12%) and walking EMG activity (c. 19%). The control group showed no significantchange in tone or EMG activity. These results document how the longissimus dorsi muscle responds immediately after manipulative therapy. Further studies would be needed to identify how long such changes persist or if such changes caused a reduction in pain or an increase in performance.
机译：马背上背最长肌的疼痛，萎缩和功能障碍会导致性能下降和生物力学改变。背部问题通常通过对该肌肉进行手法治疗来治疗。这项研究的目的是确定治疗后治疗是否立即导致了肌张力或肌电图（EMG）活动的改变。我们使用机械组织压头测量了站立时的肌肉张力，并在26匹马中绕八字形路线行走时测量了EMG活动（在背最长肌中都处于T16水平）。将马随机分为三组，分别接受：（a）脊柱（McTimoney）操纵，（b）反射抑制疗法或（c）未操纵的对照组。治疗后立即测量肌肉张力和活性。 McTimoney组和反射抑制组均显示肌肉张力（约12％）和步行EMG活性（约19％）显着下降。对照组在语气或肌电活动方面无明显变化。这些结果证明了经手治疗后背最长肌的反应如何。需要进一步的研究来确定这种变化持续多长时间，或者这种变化是否导致疼痛减轻或性能提高。

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