We studied the size of the clival region (length, widest and narrowest diameter, and distance between two jugular tuberculi) in 77 skull bases or occipital and sphenoid bones from skeletons aged 3-80 years. The comparison of the measurement points among the age groups (3-10, 11-25, 26-60, and 61-80 years) showed that the final length of the clivus was reached by 11 years of life in both men and women, and then remained constant throughout life. All other measurements did not differ among the age groups. Also, only the length of the clivus strongly correlated with age (Pearson's r = 0.336, P = 0.0028). It seems that the postnatal age up to 11 years of life is the crucial time of the development of the clivus, when the final adult width of the clivus is first reached, followed by the finalization of its growth in length.
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机译：我们研究了年龄在3至80岁之间的77个颅骨基部或枕骨和蝶骨的锁骨区域的大小（长度，最大和最窄直径以及两个颈结节之间的距离）。比较年龄组（3-10岁，11-25岁，26-60岁和61-80岁）的测量点，结果表明，男性和女性的11岁寿命都达到了最终的锁骨长度，然后保持一生不变。所有其他测量值在年龄组之间没有差异。而且，只有锁骨的长度与年龄密切相关（Pearson's r = 0.336，P = 0.0028）。似乎直到11岁时，出生后的年龄才是指骨发育的关键时刻，首先达到指骨最终的成年宽度，然后最终确定其长度增长。
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