Figure 29 The vertebral artery entering the transverse foramina The vertebral artery enters the transverse foramina typically at the C6 level. At approximately 15% the vertebral artery enters at C7. At 85%, the C7 transverse foramina do not contain the vertebral artery. The vertebral artery takes a convoluted course between C2, C1, and the occiput. Level: Structures: Other Structures: Pathology: Procedure: View: Entire cervical spine Neural: Spinal cord and nerve roots Dura Vascular: Vertebral arteries None Normal None Composite (3/4), Front, Lateral, Caudal