Bilateral variations of the vertebral arteries: The left originating from the aortic arch and the left and right entering the C5 transverse foramina
- 102 Downloads
During the dissection course for second year medical students at the University of Toyama in 2005, we encountered variations of the bilateral vertebral arteries: the left directly came off from the aortic arch as the third branch between the left common carotid artery and the left subclavian artery and entered the transverse foramen of C5, instead of C6, whereas the right originated from the right subclavian artery and entered the transverse foramen of C5. The present vertebral artery of each side was possibly formed by the 6th cervical intersegmental artery linked with the longitudinal anastomoses between the cervical intersegmental arteries. Detailed knowledge of vertebral artery variations is crucially important for surgical treatment of blood vessels in the brain, neck and chest.
Key wordsanatomy anomaly aortic arch dissection subclavian artery transverse foramen
Unable to display preview. Download preview PDF.
- Adachi B (1928) Das Arteriensystem der Japaner. Kaiserlich-Japanischen Universität zu Kyoto, Kyoto.Google Scholar
- Bruneau M, Cornelius JF, George B (2005) Anterolateral approach to the V2 segment of the vertebral artery. Neuro-surgery 57, 262–7.Google Scholar
- Carlson BM (2002) Patten’s Foundation of Embryology, 6th edn. McGraw-Hill, New York.Google Scholar
- Congdon BD (1922) Transformation of the aortic-arch system during the development of the human embryo. Cont Embryol 14, 47–110.Google Scholar
- Kato S (1976) Corrosion-anatomical studies on the arterial system of the Japanese fetuses: Aortic arch and external carotid artery. Jikeikai Med J 91, 158–70.Google Scholar
- Kodama K (2000) Vertebral artery. In: Anatomic Variations in Japanese (Sato T, Akita K, eds). University of Tokyo Press, Tokyo, 213–15.Google Scholar