-6°HDT7 d胫前肌和腓肠肌肌电图的变化  

Effect of 7 d -6°Head-down Tilt (HDT) on Electromyogram of Gastrocnemius and Anterior Tibialis Muscles.

作　　者：郭立国[1] 郭志峰[1] 谢俊水[1] 王琳杰[1] 

机构地区：[1]航天医学工程研究所,北京10094

出　　处：《航天医学与医学工程》2001年第5期332-335,共4页Space Medicine & Medical Engineering

摘　　要：目的使用计算机化动态姿态平衡仪 (CDP ,computerizeddynamicposterographaphy)评价 - 6°HDT 7d对人体下肢胫前肌和腓肠肌肌电图影响。方法被试者为 8名健康男性 ,分别于卧床前、起床后、恢复 4d测试被试者。结果左、右腿的短潜伏期反应在起床后无明显变化 ,而中潜伏期反应及长潜伏期反应起床后比实验前明显增强 ,4d后未恢复。右腿的短反应时程起床后比实验前明显延长 ,4d后短反应时程未恢复正常。左腿的短反应及中反应曲线下面积起床后比实验前明显增大 ,4d后短反应曲线下面积恢复正常 ,而中反应曲线下面积未恢复正常。结论 - 6°HDTObjective To assess the effects of 7 d -6°HDT on electromyogram of the weightbearing muscles. Method Eight healthy males,aged 33～42,were exposed to -6° HDT bed rest for 7 d, electromyogram from the gastrocnemius and anterior tibialis muscles were recorded before and after HDT, and day 4 of recovery. Result The latency of SLR(short latency response) recorded from lower leg muscles after HDT was not different from that pre HDT.But the latency of MLR(middle latency response) and LLR(long latency response) after HDT were significantly increased as compared with that pre HDT,and recovered to pre HDT level on day 4 of recovery.The durations of SLR recorded from right leg muscles after HDT were significantly longer as compared with that pre HDT, and did not recover.The integrated amplitude of SLR and MLR after HDT were significantly increased as compared with that pre HDT, and only the integrated amplitude of SLR recovered,but that of MLR did not. Conclusion Seven day -6° HDT bed rest had significant effects on electromyogram of the weightbearing muscles.

关 键 词：头倒位倾斜 卧床实验 动态姿态平衡测试 肌电图 潜伏期 曲线下面积 

分 类 号：R852.22[医药卫生—航空、航天与航海医学]