Effect of cervical spine position on upper limb myoelectric activity during pre-manipulative stretch for Mills manipulation: A new model, relations to peripheral nerve biomechanics and specificity of Mills manipulation

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• 作者：Marinko Rade^a ; ^{marinko.rade@kuh.fi} ; ^{marinko.rade@gmail.com}  ; [Author Vitae] ; Michael Shacklock^b  ; [Author Vitae] ; Stanislav Peharec^c  ; [Author Vitae] ; Petar Ba膷i膰^c  ; [Author Vitae] ; Corrado Candian^d  ; [Author Vitae] ; Markku Kankaanpä ; ä ; ^e  ; [Author Vitae] ; Olavi Airaksinen^a  ; [Author Vitae]
• 关键词：Lower Trap ; lower trapezius ; Pec.Major ; pectoralis major ; Upper Trap ; upper trapezius ; Triceps B ; triceps brachii ; Biceps B ; biceps brachii ; Brachiorad ; brachioradialis muscles
• 刊名：Journal of Electromyography and Kinesiology
• 出版年：2012
• 期刊代码：155_10506411
• 类别：med
• 出版时间：June, 2012
• 卷：22
• 期：3
• 页码：363-369
• 文件大小：978 K

摘要

Objectives

(A) Describe a new method of investigation of the possible muscular effects of the commonly practiced Mills manipulation for lateral elbow pain (epicondylalgia), (B) ascertain if myoelectric activity is influenced during the pre-manipulative stretch for Mills manipulation, (C) establish whether muscle responses are influenced by ipsilateral lateral flexion of the cervical spine which reduces mechanical tension in the peripheral nerves of the upper limb.

Sample

Eight asymptomatic subjects were tested bilaterally (N = 16).

Methods

Myoelectric measurements - EMG signals were recorded with a 16 channel pocket EMG patient unit and processed off-line. Measurement of joint positions-three CCD adjustable cameras sensitive to 10 mm reflective passive markers applied at specific locations on the subjects鈥?bodies were used to reconstruct and verify accuracy of body movements and were correlated with EMG recordings.

Results

Compared with the standard (anatomical) position of the cervical spine in which Mills manipulation is typically performed, cervical spine ipsilateral lateral flexion produced significantly reduced activity in muscles that restrain the manipulation movement (elbow extension), namely biceps brachii (P = 0.018) and brachioradialis (P = 0.000). The affected muscles may therefore produce protective effects during the manipulation.

Conclusions

Changes in myoelectric activity were in a pattern that suggests that muscle and neural mechanisms may be an integral part of the Mills manipulation. Cervical spine ipsilateral lateral flexion may be used to reduce mechanical stresses in the peripheral nerves and extraneous muscle activity, making Mills鈥?manipulation potentially safer and more specific.