Another neuro q - nab08

[ArchivalUser]

A scientist wishes to study free radical production under ischemic conditions.He decides to produce cerebral ischemia by tying off an artery of the brain.Ligation of which of the following arteries would be most likely to produce significant ischemic damage?
a-anterior cerebral artery at its origin from the internal carotid artery
b-anterior communicating artery
c-middle cerebral artery at its origin from the internal carotid artery
d-posterior cerebral artery at its origin from the basilar artery
e-posterior communicating artery

[ArchivalUser]

ccc

[ArchivalUser]

c-middle cerebral artery at its origin from the internal carotid artery

[ArchivalUser]

good jazzblue
C is correct.
The circle of Willis is a series of arterial anastomoses that circle around the pituitary stalk at the ventral surface of the brain.Only the middle cerebral artery(of the options listed)does not belong to the circle of Willis and instead courses laterally to supply the entire lateral convexity of the brain.Therefore ligation of this vessel would produce the most ischemic damage

[ArchivalUser]

u got it mr.gorgon