一个新的人类学指标:第二、四趾横向伸展运动

【目的】在中国人中首次开展第二、四趾横向伸展运动相关指标的测量分析研究.【方法】以甘肃农业大学甘肃籍汉族本科生中394人(男195例,女199例)作为调查对象,通过测量调查对象第二、四趾横向最大趾间距相对增量,然后利用系统聚类分析对调查对象第二、四趾横向伸展运动进行分类,以此来分析调查对象4种表型的出现率,还调查了足趾长、性别.【结果】调查对象中双脚第二、四趾横向运动表型相同率为79.95%,4种表型包括左和右脚第二、四趾横向伸展明显型(L∶L);左脚第二、四趾横向伸展明显型兼右脚第二、四趾横向伸展不明显型(L∶Y);左脚第二、四趾横向伸展不明显型兼右脚第二、四趾横向伸展明显型(Y∶L);左和右脚第二、四趾横向伸展不明显型(Y∶Y),所占调查对象比例分别为42.39%、8.63%、11.42%、37.56%.【结论】性别间差异以及性别中足趾长型间差异除表型L∶L和表型Y∶Y外,其他2种对称第二、四趾横向运动表型出现率无统计学意义;足趾长型间差异4种第二、四趾横向运动表型出现率无统计学意义.

A new anthropology indicator:transverse stretch movement of the second and fourth toes

[Objective] To conduct a survey of the measure and analysis of the correlative research index of the transverse stretch movement of the second and fourth toes in Chinese.[Method] A survey was conducted in 394 Han nationality undergraduates (195 males,199 females) from Gansu Agricultural University,by measure their relative increment of the transverse maximum distance between the second and fourth toes,to classify the transverse stretch movement of the second and fourth toes by hierarchical cluster method to analyse the frequency of four types of subjects,the gender and the plantar digital formula were also investigated.[Result] The types of transverse stretch movement of the second and fourth toes were the same between feet among 79.95% subjects.There were four types of movements,including non-obvious stretch of the second and fourth toes of both feet (L∶L),non-obvious stretch of the second and fourth toes of left foot and obvious stretch of the second and fourth toes of right foot (L∶Y),obvious stretch of the second and fourth toes of left foot and non-obvious stretch of the second and fourth toes of right foot (Y∶L),obvious stretch of the second and fourth toes of both feet (L∶L).The percentages of the above type within the subject are 42.39%,8.63%,11.42%,37.56% respectively.[Conclusion] The transverse stretch movement of the second and fourth toes of the type L∶Y and type Y∶L have no significant correlation with sexuality or sexual plantar digital formula expect for type L∶L and type Y∶Y.As for the four types,no significant difference is found between the transverse stretch movement of the second and fourth toes and the plantar digital formula.