【摘要】 本文通过对世居青藏高原(海拔3000～4000m)藏族和汉族7～18岁健康学生1460人手腕部X光片的分析,研究两民族在高原环境下骨发育的规律和异同。本文资料表明:高原藏族青少年手和腕部骨的发育,骨化中心出现顺序及长骨干骺愈合顺序均与汉族青少年相同,在时间上一般提前于汉族1～2年。籽骨的出现或手末节指骨的干骺愈合,两族基本一致,可作为预测月经初潮的指标。本文讨论了其差异的原因。更多还原

【Abstract】 The authors studied the regularity and difference of the skeletal development of hand wrist in 1 460 healthy children from 7 to 18 years old in Tibetan and Han nationality. They were born and live in 3 000～4 000m Qinghai Plateau. The bone age is determined by the left hand wrist X-ray film. The appearance of the ossification centers of carpal and the fusion of epiphyses with their shafts are in the same order. The appearance age and the union age in Tibetan are about 1 to 2 years earlier than that in Han nationality. The menarche in female of both nationalities came into view about 2.25～2.48 years after the appearance of sesamoid,about 0.05～0.16 years after the fusion of the distal phalanxes. The menarche can be predicted by them. This paper discussed the reason of the difference.更多还原