Finger‐print patterns in mongolism

Abstract

SUMMARY: The frequencies of arches, ulnar and radial loops and whorls on the fingers of 310 mongolian imbeciles and 1000 controls are given. In both sexes the mongols show a reduction in the frequencies of whorls, arches and radial loops, with a corresponding increase in the frequency of ulnar loops. In contrast with the controls, all the major pattern types occur with similar frequencies in both sexes.Individuals with arches on all ten fingers are nearly seven times as common in mongols as in the control population.