德宏州景颇族指嵴纹数和t三叉的分布

Investigation of finger ridge count and triradius t of Dehong Jingpo nationality in China

目的：研究景颇族人指嵴纹数（FRC）和t三叉的分布，为医学、遗传学、人类学提供正常参数。方法：在知情同意原则下，捺印调查对象的手纹。结果：各指FRC高低为拇指〉环指〉中指〉食指〉小指，无性别差异，除拇指外无手别差异。对应指FRC差值变化趋势为，随着差值增加频数逐渐减少，绝大部分差值在3以内占88．2Z。总指嵴纹数（TFRC）为116．40±26．51，无性别差异。TFRC频数分布近似正态分布，高峰组为121-140（33．64％），其次为101-120（31．64％）。atd角为39．99。±4．41。，频数分布高峰组为35~39（43．55％），其次为40~44（37．82％）。tPD为11．02％±4．01％，频数分布高峰组为10-14（46．91％），86．73％的个体tPD低于15％，无大于30％的。atd角及tPD均为女性大于男性，无手别差异。结论：德宏州景颇族对应指FRC和t三叉的分布具有对称性，和其他民族有共性也有其特异性。

Objective： To study the finger ridge count （FRC） and triradiust t in 550 normal people of Jingpo nationality, and to provide normal parameters for medicine, genetics and anthropology. Methods： The ink print of fingerprint and palmar patterns was obtained with informed consent. Results： Comparing the mean value of FRC on each finger, the order was as following： the value of thumb〉ring finger〉middle finger〉index finger〉little finger. And the mean value of each finger had no significant difference between sexes, and had no significant difference between left and right hands except in the thumb. Along with the deviation value of FRC between corresponding fingers increasing, the general variety trend o~ the fre- quency was gradually decreasing, and the overwhelming majority （88. 2%） of the value was less than or equal to 3. The av- erage value of TFRC was 116. 40±26. 51, which had no significant difference between sexes. The frequency distribution of TFRC was similar to the normal distribution with the peak group being 121-140（33.64%）. The mean value of atd angle was 39. 99°± 4. 41° and the peak group of its frequency distribution was 35-39 （43. 550%）. The mean value of tPD was 11.02%± 4. 01% with the peak group of frequency distribution being 10-14 （46.91%）. The frequency of tPD under 15 was 86.73%, and over 30% was zero. Both of atd angle and tPD had significant differences between sexes, but had no significant difference between left and right hands. Conclusion： The distribution of FRC and triradius t of Jingpo nationality is bilateral symmetry, and compared with other nationalities, it has the common characteristics and has its special characteris-