石氏颈椎旋扳法操作者上肢发力肌肉表面肌电特征研究

Study on surface electromyography characteristics of the upper limb fore-generating muscles of the operator conducting Shi’s cervical rotatory manipulation

目的研究石氏颈椎旋扳法两种术式(颈椎旋转扳法、颈椎旋提扳法)操作者上肢发力肌肉表面肌电信号特征。方法选取1名熟练掌握石氏颈椎旋扳法的手法操作者,对20名施术对象分别完成2次同一体位下的颈椎旋扳法的操作,采集操作者右侧肱桡肌、肱二头肌、肱三头肌、三角肌、冈上肌、胸大肌表面肌电信号数据,分析总结颈椎旋转扳法、颈椎旋提扳法操作者上肢发力肌肉表面肌电特征。结果(1)颈椎旋转扳法操作过程中,肌肉激活顺序依次为肱二头肌、三角肌、冈上肌、肱三头肌、肱桡肌、胸大肌,肌肉放电持续时间长短与激活顺序一致;贡献率最大的肌肉是肱二头肌,最小的肌肉是胸大肌。(2)颈椎旋提扳法操作过程中,肌肉激活顺序依次为肱桡肌、肱三头肌、肱二头肌、三角肌、冈上肌、胸大肌;肌肉放电持续时间顺序依次为肱桡肌、肱二头肌、肱三头肌、三角肌、冈上肌、胸大肌,其中肱桡肌放电持续时间最长,肱二头肌与肱三头肌放电持续时间接近,胸大肌放电持续时间最短;贡献率最大的肌肉是肱桡肌,最小的肌肉是胸大肌。(3)与颈椎旋提扳法比较,颈椎旋转扳法操作时肱桡肌积分肌电值、均方根值偏小(P<0.01),肱二头肌、三角肌、冈上肌、胸大肌、肱三头肌积分肌电值偏大(P<0.05,P<0.01),肱二头肌、三角肌、胸大肌、肱三头肌均方根值偏大(P<0.05,P<0.01)。结论实施颈椎旋转扳法的主力肌肉为肱二头肌,实施颈椎旋提扳法的主力肌肉为肱桡肌;针对肱桡肌和肱二头肌的肌肉训练可以为手法操作提供一定的有利条件。

ObjectiveTo investigate and compare the surface electromyography(sEMG)characteristics of the main force-generating muscles of the upper limbs of the operator conducting two different types of Shi’s cervical rotatory manipulation(cervical rotation manipulation and cervical rotationtraction manipulation).MethodsAn operator proficient in Shi’s cervical rotatory manipulation was selected to perform 2 different types of cervical rotatory manipulation,twice for each type,on 20subjects in the same anatomical position. The s EMG signal data of the brachioradialis muscle, biceps brachii muscle, triceps brachii muscle,deltoid muscle,supraspinatus muscle and pectoralis major muscle on the right side of the operator were collected,and the s EMG characteristics of the upper limb force-generating muscles of the operator conducting cervical rotation manipulation and cervical rotation-traction manipulation were analyzed and summarized.Results(1) During the operation of cervical rotation manipulation,biceps brachii was the first to be activated,followed by deltoid,supraspinatus,triceps brachii,brachioradialis and pectoralis major,and the sequence of muscle discharge duration was consistent with the activation sequence. The muscle with the largest contribution rate was biceps brachii,and the muscle with the smallest contribution rate was pectoralis major.(2) During the operation of cervical rotation-traction manipulation,brachioradialis muscle was the first to be activated,followed by triceps brachii,biceps brachii,deltoid,supraspinatus and pectoralis major. The sequence of muscle discharge duration was brachioradialis,biceps,triceps,deltoid,supraspinatus,and pectoralis major. Brachioradialis muscle had the longest duration of muscle discharge,biceps brachii and triceps brachii had almost equal duration,and pectoralis major muscle had the shortest duration. The brachioradialis muscle had the largest contribution rate,and the pectoralis major muscle had the smallest contribution rate.(3)Compared with the values under the operation of cervical rotation-traction manipulation,the values of integrated EMG(i EMG)and(root mean square)RMS of brachioradialis muscle were lower(P<0.01),the values of i EMG of biceps brachii,deltoid,supraspinatus,pectoralis major and triceps brachii were higher(P<0.05,P<0.01),and the values of RMS of biceps brachii,deltoid,pectoralis major and triceps brachii were higher(P<0.05,P<0.01)under the operation of cervical rotation manipulation.ConclusionThe biceps brachii is the main muscle for the practice of cervical rotation manipulation,and the brachioradialis is the main muscle for the practice of cervical rotation-traction manipulation. Therefore,the muscle training for brachioradialis and biceps brachii can provide certain favorable conditions for manipulation.