Henneberg M, George B J
Department of Anatomy and Human Biology, University of the Witwatersrand, Medical School, Parktown, South Africa.
Am J Phys Anthropol. 1995 Apr;96(4):329-34. doi: 10.1002/ajpa.1330960402.
Occurrence of a secular trend in the presence of a common anatomical variant-median artery of the forearm is studied. Data from the literature indicated the incidence of the median artery to be between 4.4 and 8.3% in adult cadavers studied before 1960 while our recent study found a frequency of 27.2%. In 224 adult and 60 infant cadavers of people born between 1900 and 1991 studied using a uniform method the incidence of the median artery in the birth cohort 1900-1910 was 15.0% of individuals, it rose to 29.7% in 1921-1930 and further to 38.1% in 1951-1960 to become 52.8% in 1980-1991. This trend is statistically significant. Since the median artery is deemed to dwindle away in most individuals around the 7th week of the intrauterine life, the increasing proportion of individuals who retain it into postnatal life may indicate a recent trend in human intrauterine development.
对前臂常见解剖变异——正中动脉出现的长期趋势进行了研究。文献数据表明，在1960年之前研究的成年尸体中，正中动脉的发生率在4.4%至8.3%之间，而我们最近的研究发现其频率为27.2%。在对1900年至1991年出生的224具成年尸体和60具婴儿尸体采用统一方法进行研究时，1900 - 1910年出生队列中正中动脉的发生率为个体的15.0%，在1921 - 1930年升至29.7%，在1951 - 1960年进一步升至38.1%，在1980 - 1991年达到52.8%。这种趋势具有统计学意义。由于在子宫内生活约第7周时，大多数个体的正中动脉被认为会逐渐消失，出生后仍保留该动脉的个体比例增加可能表明人类子宫内发育的近期趋势。
