Through the transverse foramen of the cervical vertebrae
Vertebral artery and vein pass through. However, the vertebral artery does not pass through the foramen transversum of the seventh cervical vertebra but enters through the foramen transversum of the sixth cervical vertebra. The vertebral artery passes through the foramen transversum of the atlas and enters the foramen magnum, where it joins the left and right sides to form the basilar artery, which feeds the brain.