头侧直肌起始于tpa的上表面，止于枕骨颈静脉突的下表面，可作为确定颅外颈静脉孔、茎乳孔的解剖标志。

The rectus capitis lateralis muscle extends vertically behind the internal jugular vein from the TPA to the jugular process of the occipital bone.

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结论：在枕骨斜坡区、海绵窦上缘和蝶骨小翼外下方手术时，应特别注意辨认和保护动眼神经。

Conclusion: The nerve must be identified and protected in the operation of clivus, cavernous sinus and lesser sphenoid wing.

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方法：在枕外隆凸下缘中点处作T字型切口，去除左侧枕骨。

Methods Make in the next the middle point of the type of t slice, do away with the left side Occipital bone.

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