Gutiérrez-Redomero E, Alonso M C, Dipierri J E
Department of Physical Anthropology, University of Alcalá and University Institute of Investigation on Police Sciences, 28871 Alcalá de Henares, Spain.
Homo. 2011 Dec;62(6):487-99. doi: 10.1016/j.jchb.2011.05.001. Epub 2011 Oct 22.
Ridge density (RD), the number of digital ridges per unit area, varies according to sex, age, and population origin. The main objective of this study was to determine the extent of sexual dimorphism in RD and to set the age at which it appears, in an Amerindian sample from the Mataco-Mataguayo population. The sample studied for this research consisted of 99 males and 110 females, between 6 and 25 years old, which amounts to a total of 2090 fingerprints. Ridge count was carried out on distal radial and distal ulnar and on proximal regions of each finger to explore the RD patterns in order to identify similarities and differences among samples, areas, age groups, and sexes. RD decreased with age and, at all ages, RD was higher on the distal (radial and ulnar) areas, followed by the proximal sides. Females were found to have higher RD than males when older than 12 years, but not when younger. In the radial area, the Mataco-Mataguayo population, in both sexes, presented the RD similar to Spanish samples, but higher than all other populations analysed to date using this method. Variations in RD in the Amerindian population based on sex, age, and topology were confirmed in this work, and it is postulated that these variations are due to developmental differences among individuals and populations. A comparison between the Mataco-Mataguayo and Spanish populations is presented.
嵴密度（RD），即单位面积内的指纹嵴数，会因性别、年龄和人口来源而有所不同。本研究的主要目的是确定马塔科 - 马塔瓜约人群的美洲印第安样本中RD的性别二态性程度，并确定其出现的年龄。本研究的样本包括99名男性和110名女性，年龄在6至25岁之间，共计2090个指纹。对每个手指的桡侧远端、尺侧远端和近端区域进行嵴数计数，以探索RD模式，从而确定样本、区域、年龄组和性别之间的异同。RD随年龄增长而降低，并且在所有年龄段，远端（桡侧和尺侧）区域的RD都更高，其次是近端区域。研究发现，12岁以上女性的RD高于男性，但12岁以下并非如此。在桡侧区域，马塔科 - 马塔瓜约人群的男女RD与西班牙样本相似，但高于迄今为止使用该方法分析的所有其他人群。本研究证实了美洲印第安人群中RD在性别、年龄和拓扑结构上的差异，并推测这些差异是由于个体和人群之间的发育差异所致。本文还对马塔科 - 马塔瓜约人群和西班牙人群进行了比较。
