东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

人体头低脚高仰卧时下肢被动运动对背部肌肉疲劳的影响

ISSN号：1004-7220
期刊名称：《医用生物力学》
时间：0
分类：R318.01[医药卫生—生物医学工程;医药卫生—基础医学]
作者机构：[1]北京航空航天大学生物与医学工程学院、生物力学与力生物学教育部重点实验室、科技部“空天生物技术与医学工程”国际联合研究中心,北京100191
相关基金：国家自然科学基金资助项目（10925208,11120101001,l1202017）,教育部博士点新教师基金项目（20121102120039）,北京市自然科学基金项目（7133245）,北星摆颤一体脊柱梳理健身仪生物力学分析项目.

作者：赵美雅[1], 王丽珍[1], 马键[1], 项嫔[1], 田山[1], 倪义坤[1], 杜智勇[1], 张辉[1], 樊瑜波[1]

关键词：头低位, 被动运动, 肌肉疲劳, 肌电活动, 下肢, Head-down tilting, Passive motion, Muscle fatigue, Electromyography （EMG） activity, Lowerextremity

中文摘要：

目的研究人体头低位状态下肢被动运动对背部主要肌肉肌电（electromyogram，EMG）活动性的影响。方法选取30名健康受试者，分析竖脊肌和斜方肌在不同头低位角度（0°、10°、20°、27°）下静止状态、120次／min和140次／min足部摆动模式和680次／min足部颤动模式下EMG变化趋势。结果在头低位静止状态时，4种头低位角度下中位频率（mediafrequency，MF）随角度增加均呈下降趋势；摆动模式下，4种头低位角度的MF值均小于静止状态，且当摆动速度为120次／min时，MF值随角度增加而减小；速度为140次／min时，MF值无规律性变化。颤动模式下，MF值随头低位角度增大而增大，且均大于静止状态。结论静止状态下，肌肉疲劳程度随头低位角度增加而增加；颤动模式下应选择较小的头低位角度可更好达到锻炼治疗效果，摆动模式下可选择较大的头低位角度有助于较好达到锻炼治疗效果。此外，为避免肌肉过度疲劳造成劳损，摆动速度应不大于120次／min。

英文摘要：

Objective To study the effect of passive motion from lower extremity on electromyography （EMG） activity of major muscles when the back under head-down tilting state. Methods Thirty healthy subjects were se- lected. The EMGs of erector spinal and trapezius muscles were recorded and analyzed when human body was under head-down tilting at angel of 0°, 10°, 20° and 27° in static mode, respectively, in sway mode （along the axis of Z with frequencies of 120 and 140/min, respectively） and in vibration mode （along the axis of Y with fre- quency of 680/min） with the help of multifunctional test bed. Results In the static mode, the median frequency （MF） decreased with the increase of head-down titling angle; in the sway mode, the MF at each of 4 head-down tilting angles was smaller than that in the static mode. When the frequency was 120/min, the MF decreased with head-down tilting angle increasing, but when the frequency reached 140/rain, the variation of MF became irregu- lar. In the vibration mode, the MF increased with the increase of head-down tilting angle and was larger than thatin the static mode. Conclusions In the static mode, the muscle fatigue increased with the head-down tilting an- gle increasing; in the vibration mode, smaller head-down tilting angle should be selected to achieve better treat- ment effect; but in the sway mode, larger head-down tilting angle would be better, and the sway frequency should be set lower than 120/min to avoid potential damage due to excessive muscle fatigue.