一千例甘南藏族手纹学分析

本文报道1000例甘南藏族手纹学正常值。各类指端纹型按出现频率的多少依次为:尺箕(Lu)、斗形(W)、双箕(Wd)、桡箕(Lr)、弓形(A)、帐弓(A~t)。掌褶正常型占74.45±0.97、通贯手占8.15±0.61、总指嵴数168.10±51.54、a—b嵴数34.95±8.92、atd角(度)39.18±4.36。

ANALYSIS OF DERMATOGLYPHICS OF 1000 CASES ON GANNAN TIBETAN

This paper reported the survey results of dermatoglyphics on 1000 cases of Gannan Tibetans. The finger patterns: Ulnar loops 44.71%, whorls 37.73%, radial loops 3%, tented arches 1.05%, double loops 7.93%, central pocket whorls 3.6% and arches 1.99%. Patterns of radial loop and arch occur most often on digit 2. The radial loops and tented arches have the lowest frequency on digit 1. The arches have the lowest on digit 5. The females have slightly more radial loops arches than males. Palmar creases: The normal type is 74.75%, variation types 25.38% included simian line 8.15% and other types 17.23% (The latter include transition 1, 2 and sydney forms). The palm Iengthl9.89 cm on average. The distance from proximal wrist creases to t triradius is 2.27 cm. The total finger ridge count (TFRC): a-b ridge counts are 168.10 and 34.95 respectively. The atd angle is 39.18. The thenar and hypothenar patterns are 11.20% and 12.30% respectively. The missing of a, b. c, d triradius is 5.25% and displaced distally t triradius, 13.00%.