胸锁乳突肌表面肌电图的研究  

The surface ECG of sternocleidomastoid muscle

作　　者：黄宇琦[1] 阚和平[1] 林智棋[1] 周杰[1] 李义凯[2] 

机构地区：[1]南方医科大学附属南方医院肝胆外科,广州510515 [2]南方医科大学中医药学院正骨科

出　　处：《中国康复医学杂志》2009年第6期523-525,共3页Chinese Journal of Rehabilitation Medicine

摘　　要：目的:记录胸锁乳突肌不同体位姿势时的表面肌电图以评估其疲劳的发生及临床意义。方法:采用表面肌电图仪,用双电极引导法对8名健康受试者的胸锁乳突肌进行等长收缩和屈伸疲劳状态下的检测。观察指标为中位频率(MF)和平均功率频率(MPF)。在头平视、头前屈、头后伸、深吸气、头旋转、头强力前屈等姿势下记录右侧胸锁乳突肌的表面肌电图。结果:头平视位60s时MF为33.00±2.12,MPF为51.00±4.33;头前屈位60s时MF为28.50±1.51,MPF为58.00±3.13;头后伸位60s时MF为23.00±1.35,MPF为45.30±6.21;深吸气60s时的MF为21.00±1.75,MPF为41.00±3.51。头向左侧旋至极限60s时,其MF为46.00±3.42,MPF为56.00±2.72;头向右侧旋至极限60s时,MF为59.00±2.53,MPF为71.00±4.64;头强力前屈5min的前1minMF为43.00±4.27,MPF为95.00±4.61;后1min时MF为19.00±3.73,MPF为48.00±4.22。结论:不同体位下胸锁乳突肌的MF和MPF值不同,这可能与该肌的不同部位、形态结构特点及功能相关。提示某些不当体位姿势可造成胸锁乳突肌的劳损。Objective： To record surface electromyography（EMG） of stemocleidomastoid muscle in different positions, in order to evaluate the fatigue occurrence and it＇s clinical significance. Method： The Median frequency （MF） and mean power frequency （MPF） of surface ECG in conditions of isometric contraction and flexion-extension fatigue were recorded with ME6000-T8 in 8 healthy volunteers. Measured postures included the neutraliposition, flexion, extension, deep inspiration, extremely head rotation and flexion. The Surface ECG of right side was measured in all of postures. Result： MF and MPF were 33.00±2.12 and 51.00±4.33 respectively in natural posture. In flexion, kept the posture for 60s, MF and MPF were 28.50±1.51 and 58.00±3.13 respectively. The MF and MPF were 23.00± 1.35 and 45.30±6.21 during the extension. Making a deep inspiration, the MF was 21.00±1.75 and MPF was 41.00±3.51. During the turning head to left side exetrmely for 60s, MF and MPF were 46.00±3.42 and 56.00±2.72, and turning head to right side exetImely, MF and MPF were 59.00±2.53 and 71.00±4.64. Keeping the flexion extremely for 5 min, the MF and MPF in first and last one mintues were recorded and measured, they were 43.00 ±4.27 and 95.00 ±4.61, 19.00 ±3.73 and 48.00 ±4.22 respectively. Conclusion： The MF and MPF of sternocleidomastoid muscle were different at various body positions in normal people, this may be related to it＇s situation in different parts, structural characteristics and functions. It suggested that some improper body positions can cause the muscle strain.

关 键 词：胸锁乳突肌:表面肌电图 肌肉疲劳 肌筋膜 

分 类 号：R444[医药卫生—诊断学]