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Question 666
Anatomy → Region
Classification
Question
SSBAQuestion Header
Which artery directly connects the right and left anterior cerebral arteries?
Question Stem
Select the single best answer.
Options
A
Anterior communicating artery
B
Posterior communicating artery
C
Middle cerebral artery
D
Basilar artery
E
Posterior inferior cerebellar artery
Explanation
The internal carotid artery gives rise to the anterior cerebral artery and continues as the middle cerebral artery. The right and left anterior cerebral arteries are connected by the anterior communicating artery as part of the circle of Willis.
Option Validity
B) Posterior communicating arteries participate in communication between the anterior and posterior circulations but do not directly connect the two anterior cerebral arteries.
C) The middle cerebral artery is a continuation of the internal carotid circulation and does not connect the two anterior cerebral arteries.
D) The basilar artery is formed by fusion of the vertebral arteries.
E) The posterior inferior cerebellar artery arises from the vertebral artery before formation of the basilar artery.
Further Reading
Saxena R. Textbook for MRCOG-1. Chapter 2: Anatomy, p.10.