【摘要】 观察了600块西北地区成人寰椎(未分性别)。其横突后根背侧出现沟或管之％构成为67.67％(406块),其中出现后沟者239块(39.83％);出现后管者102块(17.00 9,6);一侧出现后沟、另侧出现后管者65块(10.83％)。出现横突后沟或管之侧差不显著。观察结果与国内外资料作了比较。更多还原

【Abstract】 Observations were made on six hunbred adult atlas vertebrse collected from Northwest China. Retrotraasverse groove (s) or canal (s) were found in 406 (67.67%) , 239 (39.83%) with groove (s), 102 (17.00%) with canal (s), and 65 (10.83%) with groove on one side and canal on the other. Percentages of the grooves or canals do not show any significant differences between the left and right sides. Results of the observation are compared with available data published in China and abroad.更多还原