Gutiérrez-Redomero Esperanza, Quirós Juan A, Rivaldería Noemí, Alonso María C
Departamento de Zoología y Antropología Física, Instituto Universitario de Investigación en Ciencias Policiales, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain.
J Forensic Sci. 2013 May;58(3):592-600. doi: 10.1111/1556-4029.12092. Epub 2013 Mar 4.
Variability in ridge density in a sub-Saharan population sample was studied by counting ridges in three fingerprint areas (two distal regions, radial and ulnar, and one proximal region) on the epidermal surface of the distal phalanx. Study material was obtained from the fingerprint impressions of 100 male sub-Saharan subjects aged between 18- and 48-years old. The results were compared with those obtained from a Spanish population sample. Sub-Saharan males presented lower ridge density than Spanish males in the distal regions (radial and ulnar) of all fingers, whereas differences in the proximal region were only observed on some fingers. Using the differences observed between these populations, the likelihood ratio for inferring membership of one of the populations from a fingerprint of unknown origin was calculated; therefore, a ridge density of 14 or less for both areas (ulnar and radial), support an origin sub-Saharan versus Spanish population.
通过计算远端指骨表皮表面三个指纹区域（两个远端区域，即桡侧和尺侧，以及一个近端区域）的嵴纹数量，研究了撒哈拉以南人群样本中嵴纹密度的变异性。研究材料取自100名年龄在18至48岁之间的撒哈拉以南男性受试者的指纹印记。将结果与从西班牙人群样本中获得的结果进行比较。撒哈拉以南男性在所有手指的远端区域（桡侧和尺侧）的嵴纹密度低于西班牙男性，而仅在某些手指上观察到近端区域存在差异。利用这些人群之间观察到的差异，计算了从未知来源指纹推断属于其中一个人群的似然比；因此，尺侧和桡侧两个区域的嵴纹密度均为14或更低，则支持其来自撒哈拉以南人群而非西班牙人群。
