足部内在肌形态的测量和与人体静态平衡稳定性的关系

Measurement of foot intrinsic muscle morphology and its relationship with human body static balance stability

为探究采用超声波技术测量足部内在肌形态的可重复性,并通过对足部内在肌形态与闭眼单腿站立时间的相关性分析探讨足部内在肌对维持人体稳定性的影响。对15名健康青年受试者采用B型超声波技术重复测量趾短屈肌、拇短屈肌、拇展肌及小趾展肌等4个足部内在肌的纵向图像以及横截面图像,用Image J图像处理软件测量肌肉厚度及横截面积,用SPSS数据处理软件对两次测量数据进行组内相关系数(ICC)分析,以检测该测试方式的可重复性;同时还测量了闭眼单腿站立时间用以评价平衡稳定性,并对其与4个足部内在肌的形态进行Pearson相关系数分析,探讨内在肌形态对静态平衡能力的影响。结果发现:采用超声波技术对足部内在肌厚度与横截面积的两次测量值的ICC值大部分大于0.9,表明该测试方法的可重复性良好;拇展肌厚度、趾短屈肌及小趾展肌的横截面积与闭眼单腿站立时间成显著性相关,而拇展肌横截面积与其成非常显著相关;足部内在肌横截面积越大,闭眼单腿站立时间越久。结果说明:采用B型超声波技术测量足部内在肌形态的可靠性良好;足部内在肌的形态会影响人体静态平衡控制,对足部核心区稳定性的作用不可忽视。

In order to probe into the repeatability of measuring foot intrinsic muscle morphology by using ultrasonic technology, and to study the effects of foot intrinsic muscles on maintaining human body stability by analyzing the correlation between foot intrinsic muscle morphology and eyes closed single leg standing time, the authors repeatedly measured the longitudinal and cross-sectional images of such 4 foot intrinsic muscles as flexor digitorum brevis, flexor hallucis brevis, abductor hallucis and abductor digiti minimi of 15 healthy young testees by using type B ultrasonic technology, measured muscle thicknesses and cross-sectional areas by using image processing software Image J, and performed an interclass correlation coefficient（ICC） analysis on two sets of measurement data by using data processing software SPSS, so as to verify the repeatability of this test method; in the mean time, the authors also measured eyes closed single leg standing time in order to evaluate balance stability, analyzed the Pearson coefficients of correlation between eyes closed single leg standing time and the morphologies of the four foot intrinsic muscles, and probed into the effects of foot intrinsic muscle morphology on static balance ability. The authors revealed the following findings： most ICC values of two sets measurement values of foot intrinsic muscle thicknesses and cross-sectional areas measured by using ultrasonic technology were greater than 0.9, which means that the repeatability of this test method is good; the thickness of abductor hallucis and the cross-sectional areas of flexor digitorum brevis and abductor digiti minimi were significantly correlative with eyes closed single leg standing time, while the cross-sectional area of abductor hallucis was very significant correlative with eyes closed single leg standing time; the larger the cross-sectional area of foot intrinsic muscles, the longer the eyes closed single leg standing time. The said findings indicate the followings： the reliability of measuring foot intrinsic muscle morphology by using type B ultrasonic technology is good; foot intrinsic muscle morphology will affect human body static balance control, its function on foot core area stability should not be neglected.