VAN-0056
QUESTION
‘Circle of Willis’ formed from branches of emergent arteries which arise from?
OPTIONS
(A) Internal maxillary
(B) Rete mirabile cerebri
(C) Cerebral
(D) Cerebellar
ANSWER
(B) Rete mirabile cerebri
EXPLANATION
The cerebral arterial circle, or Circle of Willis, is formed by arterial connections associated with the cerebral arterial supply arising from the rete mirabile cerebri in domestic animals. The internal maxillary artery supplies the rete, but the rete itself is the arterial network from which the relevant emergent cerebral arteries arise.