老年人两侧踝关节本体感觉及其与肌力的相关性研究

A study on correlation of proprioception and strength between left and right ankles of elder people

目的:对比老年人左右两侧踝关节本体感觉的差异和左右两侧峰力矩之间的差异,分析踝关节本体感觉与其肌力的相关性。方法:在Biodex System3等速系统上用被动复位测试法测试53名正常老年人(其中男23名、女30名;平均年龄66.2±5.1岁)的踝关节本体感觉,本研究以被动复位绝对误差角度作为个体本体感觉能力优劣的代表。同时采用Biodex System3等速系统对踝关节屈肌、伸肌肌群在30°/s的角速度下进行向心测试,主要观察指标为各肌群的峰力矩与相对峰力矩。结果:①左侧踝关节复位的绝对误差角度小于右侧踝关节(P=0.011);②左侧踝关节屈肌、伸肌的峰力矩都小于右侧踝关节(P<0.001),左侧踝关节伸肌的相对峰力矩小于右侧踝关节(P<0.001);③踝关节本体感觉误差和肌力之间没有相关性(P>0.05)。结论:左侧踝关节的本体感觉优于右侧踝关节,而左侧踝关节屈肌与伸肌的峰力矩和相对峰力矩均小于右侧踝关节,老年人踝关节本体感觉功能与肌力无相关性。

Objective：To compare the difference of proprioception and peak torque between left and right ankles of elder people,and analyse its＇ correlation. Method：Proprioception ankle joints of fifty-three healthy elder people（23 male and 30 female;average age 66.2±5.1 year） were measured for two tests on Biodex system 3 dynamometer. The absolute error ankle in passive replication test was used to assess ankle proprioceptive function. The ankle flexor muscle, extensor muscle isokinetic concentric peak torque were measured on Biodex system 3 dynamometer at the speed of 30°/s. The main measurement indexes were concentric peak torque and relative peak torque of ankle flexor muscle and extensor muscles. Result：The absolute error angles of passive replication test on left ankels were less than that on right ankles（P=0.011）. Concentric peak torques of flexor muscle and extensor muscle of left ankles were less ankles than that of right ankle（P〈0.001）, and concentric relative peak torques of extensor muscle of left were less than that of right ankles（P〈0.001）. There was no significant correlation between proprioception errors and muscle strength（P〉0.05）. Conclusion： Proprioception of left ankle is better than that of right ankle, but concentric peak torque and relative peak torque of flexor muscle and extensor muscle of left ankle is less than that of right ankle. There was no significant correlation between the proprioception and muscle strength in the elderly.