1. Cervical vertebral artery
2. Muscular branches of vertebral artery
3. Vertebral artery branch, radicular supply to spinal cord anterior, lateral surface
4. Vertebral artery in the C1 (foramen) region
5. Extradural portion of vertebral artery, superior surface of the C1 lamina
6. Intradural vertebral artery - posterior then lateral then anterior to medulla
7. Lateral medullary segment of posterior inferior cerebellar artery (PICA)
8. Post-medullary segment of PICA
9. Supratonsillar segment of PICA
10. Choroidal branches of PICA
11. Post-tonsillar branches of PICA
12. Inferior vermian branch of PICA
13. Posterior cerebellar hemispheric branches of PICA