健康青年下台阶时股内侧肌、股直肌和股外侧肌间的表面肌电变化  

Surface Electromyography Changes of Vastus Medialis, Rectus Femoris and Vastus Lateralis during Stair Descent in Healthy Youth

作　　者：史昊楠 桂沛君 徐大卫 郭辉[2] 谢瑛[1] SHI Hao-nan;GUI Pei-jun;XU Da-wei;GUO Hui;XIE Ying(Beijing Friendship Hospital, Capital Medcial University, Beijing 100050, China;Beijing Bo'ai Hospital, China Rehabilitation Research Center, Beijing 100068, China)

机构地区：[1]首都医科大学附属北京友谊医院,北京市100050 [2]中国康复研究中心北京博爱医院PT3科,北京市100068

出　　处：《中国康复理论与实践》2017年第10期1162-1165,共4页Chinese Journal of Rehabilitation Theory and Practice

摘　　要：目的探讨健康青年下台阶时股内侧肌、股直肌及股外侧肌的肌肉收缩强度差异。方法 2016年,选取首都医科大学2015级30名健康在校大学生,将电极贴于优势侧股四头肌上,采集受试者下台阶过程中的股内侧肌、股直肌及股外侧肌的肌电信号。结果在下台阶过程中,股直肌的最大收缩幅值和平均收缩幅值显著小于股内侧肌和股外侧肌(P<0.001);而股内侧肌和股外侧肌无显著性差异(P>0.05)。结论健康青年在下台阶过程中股内侧肌及股外侧肌的活性显著高于股直肌;股内侧肌与股外侧肌协同收缩活性相当。Objective To evaluate the activities of vastus medialis,rectus femoris and vastus lateralis during stair descent in healthyyouth.Methods Thirty healthy college students were recruited from the Capital Medical University2015admissions in2016.The electrodewas put on the dominant side of the quadriceps.Surface electromyography was used to record muscle activity during stair descent.ResultsDuring stair descent,the maximum amplitude and mean amplitude were significantly lower in rectus femoris than in vastus medialis and vastuslateralis(P<0.001).No significant difference was found between vastus medialis and vastus lateralis(P>0.05).Conclusion The activationof both vastus medialis and vastus lateralis during stair descent is significantly higher than that of rectus femoris.The coactivation ofvastus medialis and vastus lateralis is equal in healthy youth.

关 键 词：下台阶 股四头肌 收缩强度 表面肌电图 

分 类 号：R322.7[医药卫生—人体解剖和组织胚胎学]