Our study showed the following : mastoid process transverse process of the atlas and occipital condyle were important signs superior and inferior suboccipital triangle is the important mark for distinguishing vertebral artery .

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Conclusion The suboccipital triangle and the dorsal root of C2 were the important masks of the VA.

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Familiar with the anatomical location of the suboccipital triangle muscle posterior belly of digastric and the lateral rectus was beneficial with intraoperative protection of the vertebral artery and the facial nerve and other important organizational structure . 2 .

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