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Fig. 2 | Chinese Neurosurgical Journal

Fig. 2

From: Classification and microsurgical treatment of foramen magnum meningioma

Fig. 2

The segment of the vertebral artery and the relationship between FMM and vertebral artery. a The segment of the vertebral artery. V1, from the origin of the vertebral artery to the upper margin of the lateral foramen of C2. V2, from the upper margin of the lateral foramen of C2 to the lower margin of the transverse foramen C1. V3, from the lower margin of the transverse foramen of C1 to the vertebral artery craniotomy. V4, intracranial segment of the vertebral artery. b The relationship between FMM and V4. SVA, IVA, and MVA, the FMM is located in the superior, inferior, and mixed vertebral artery

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