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1·The superior nuchal line is not always a reliable external anatomical mark.

上项线不是一个可靠的浅表解剖学标志。

2·Results The data of this study showed that the superior nuchal line and inion is not always a reliable external anatomical mark to locate the transverse sinus and torcular herophili.

结果实验所收集的数据表明在定位横窦下缘和窦汇时，上项线及枕外隆凸尖不是一个可靠的浅表解剖学标志。