Quiz Form

Question Date: 31/10/2023

Question: At the level of C3, the anterior and posterior spinal arteries originate primarily from which of the following blood vessels?

Options:

• Anterior spinal artery internal carotid posterior spinal arteries aortic arch
• Anterior spinal artery internal carotid posterior spinal arteries internal carotid
• Anterior spinal artery vertebral posterior spinal arteries aortic arch
• Anterior spinal artery vertebral posterior spinal arteries vertebral

Correct Answer: Anterior spinal artery vertebral posterior spinal arteries vertebral

Explaination: The anterior and posterior spinal arteries originate from descending branches of the vertebral arteries in the neck. At cervical levels, segmental arteries branching off the vertebral arteries also contribute.

Reference: Page 16,Cho TA. Spinal cord functional anatomy. Continuum (Minneap Minn). 2015 Feb21(1 Spinal Cord Disorders)13-35. doi 10.121201.CON.0000461082.25876.4a. Erratum in Continuum (Minneap Minn). 2015 Jun21(3 Behavioral Neurology and Neuropsychiatry)590. PMID 25651215.