头颈前屈和后伸运动中胸锁乳突肌作用的肌电图测定和力学分析  

Biomechanical Analysis and Electromygraphy for Sternocleidomastoideus Contraction on Neck Flexion and Extention

作　　者：梅唯奇 朱红华 郑正涛[3] 

机构地区：[1]珠海市卫生学校解剖学教研室,广东珠海市519020 [2]珠海市卫生学校康复医学教研室,广东珠海市519020 [3]中山大学附属第五医院肌电图室,广东珠海市519000

出　　处：《中国康复理论与实践》2012年第12期1158-1159,共2页Chinese Journal of Rehabilitation Theory and Practice

摘　　要：目的研究双侧胸锁乳突肌收缩在头颈前屈和后伸运动中的作用。方法以24名正常学生为受试对象,在仰卧位颈部放松和前屈运动时、俯卧位颈部放松和后伸运动时分别进行肌电图测定,并利用解剖学标本及模型进行力学测量和生物力学分析。结果在仰卧位颈部放松、俯卧位颈部放松和后伸时,胸锁乳突肌均为电静息电位;在仰卧位颈部前屈时,胸锁乳突肌运动单位电位募集类型均为混合相。结论在颈椎关节不固定状态下,双侧胸锁乳突肌收缩使头颈部前屈;在固定寰枕关节以下颈部关节时,双侧胸锁乳突肌收缩使头后伸。Objective To investigate the effects of bilateral stemocleidomastoideus contraction on neck flexion and extension. Methods The electromyograms （EMG） signals of left stemocleidomastoideus of 24 healthy persons were recorded respectively when neck relaxation and flexion in the supine position, and neck relaxation and extension in the prone position. The biomechanical measurement and analysis were done using anatomical specimens and models. Results The sternocleidomastoideus registered electrical resting potential when neck re- laxation in the supine position, and when neck relaxation and extension in the prone position; the motor unit action potential of sternocleido- mastoideus raised the type of mixed phase when neck flexion in the supine position. Conclusion The contractions of bilateral sternocleido- mastoideus can lead to the head and neck flexion while neck joints are not fixed, and the contractions of bilateral sternocleidomastoideus can lead to the head extension under the state of fixing neck joints below atlanto-occipital.

关 键 词：胸锁乳突肌 屈伸运动 作用 

分 类 号：R337[医药卫生—人体生理学]