PDF(Pubmed)
Abstract：
BACKGROUND: Dysfunctional gliding of deep fascia and muscle layers forms the basis of myofascial pain and dysfunction, which can cause chronic shoulder pain. Ultrasound shear strain imaging may offer a non-invasive tool to quantitatively evaluate the extent of muscular dysfunctional gliding and its correlation with pain. This case study is the first to use ultrasound shear strain imaging to report the shear strain between the pectoralis major and minor muscles in shoulders with and without chronic pain.
METHODS: The shear strain between the pectoralis major and minor muscles during shoulder rotation in a volunteer with chronic shoulder pain was measured with ultrasound shear strain imaging. The results show that the mean ± standard deviation shear strain was 0.40 ± 0.09 on the affected side, compared to 1.09 ± 0.18 on the unaffected side (p<0.05). The results suggest that myofascial dysfunction may cause the muscles to adhere together thereby reducing shear strain on the affected side.
CONCLUSIONS: Our findings elucidate a potential pathophysiology of myofascial dysfunction in chronic shoulder pain and reveal the potential utility of ultrasound imaging to provide a useful biomarker for shear strain evaluation between the pectoralis major and minor muscles.
METHODS: The shear strain between the pectoralis major and minor muscles during shoulder rotation in a volunteer with chronic shoulder pain was measured with ultrasound shear strain imaging. The results show that the mean ± standard deviation shear strain was 0.40 ± 0.09 on the affected side, compared to 1.09 ± 0.18 on the unaffected side (p<0.05). The results suggest that myofascial dysfunction may cause the muscles to adhere together thereby reducing shear strain on the affected side.
CONCLUSIONS: Our findings elucidate a potential pathophysiology of myofascial dysfunction in chronic shoulder pain and reveal the potential utility of ultrasound imaging to provide a useful biomarker for shear strain evaluation between the pectoralis major and minor muscles.
摘要：
背景：深筋膜和肌肉层的功能失调是肌筋膜疼痛和功能障碍的基础，会导致慢性肩痛.超声剪切应变成像可以提供一种非侵入性工具来定量评估肌肉功能失调的程度及其与疼痛的相关性。该案例研究是第一个使用超声剪切应变成像报告有无慢性疼痛的肩部胸大肌和小肌之间的剪切应变。
方法：使用超声剪切应变成像测量了患有慢性肩痛的志愿者在肩部旋转过程中胸大肌和小肌之间的剪切应变。结果表明，受影响侧的剪切应变平均值±标准偏差为0.40±0.09，与未受影响侧的1.09±0.18相比（p<0.05）。结果表明，肌筋膜功能障碍可能会导致肌肉粘附在一起，从而减少患侧的剪切应变。
结论：我们的发现阐明了慢性肩痛中肌筋膜功能障碍的潜在病理生理学，并揭示了超声成像的潜在用途，为评估胸大肌和小肌之间的剪切应变提供了有用的生物标志物。
方法：使用超声剪切应变成像测量了患有慢性肩痛的志愿者在肩部旋转过程中胸大肌和小肌之间的剪切应变。结果表明，受影响侧的剪切应变平均值±标准偏差为0.40±0.09，与未受影响侧的1.09±0.18相比（p<0.05）。结果表明，肌筋膜功能障碍可能会导致肌肉粘附在一起，从而减少患侧的剪切应变。
结论：我们的发现阐明了慢性肩痛中肌筋膜功能障碍的潜在病理生理学，并揭示了超声成像的潜在用途，为评估胸大肌和小肌之间的剪切应变提供了有用的生物标志物。
