保安族人指毛的分布

通过对居住在甘肃省保安族东乡族撒拉族自治县的年龄在16~50岁之间的保安族人312例(男159例,女153例)手指指毛分布情况进行调查,随机取样观察记录手指各指指毛的分布情况,对2~5指近侧指节指毛位居桡侧、正中及尺侧者,分别以R、M、U记录,并进行统计分析.以便了解保安族人手指指毛的分布情况,为进行体质人类学研究积累资料.结果:保安族人手指远侧指节没有指毛生长,近侧指节全部生有指毛,中间指节一部分人生有指毛,保安族人中间指节指毛出现率为41.7%(男49.1%,女34.0%),男性高于女性(P=0.007<0.05).2~5指中间指节指毛出现率构成比由高到低的排列顺序为4>3>5>2.手指指毛的分布规律和出现率是反映体格特征的有效参数,对进行体质人类学研究有重要价值.

Digital Hair Distribution of Baoan Nationality

Objective: To investigate the digital hair distribution of the Baoan nationality for study of physical anthropology.Methods: A random sample of 312 Baoan nationality(159 males,153 females) in Gansu province between the ages from 16 to 50 years old was investigated.The digital hair distribution on each finger were observed and recorded.The radial,median and ulnar deviation of digital hair on the proximal digital segments of the 2～5 fingers were recorded as R,M and U respectively.All statistical data are analyzed.Results: The investigation shows that hair did not exist on the distal digital segments in all people in Baoan nationalities.But it existed on the proximal digital segments of the hand in all people and on the middle digital segments in some people.The frequency on middle digital segments' hair(FMDSH) is 41.7%(males 49.1%,females 34.0%).It is higher in males than the one in females(P=0.007).The sequence of FMDSH in 2～5 fingers from the high to the low are 4>3>5>2.Conclusion: The distributional law and the frequency of the digital hair are proved with an effective parameter reflecting physique characteristics.It is of great importance to make a study of physical anthropology.