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NNL Awaitin The Unexpected Topics: 779 Posts: 6613	Apr 22, 2007 - 9:06 AM       #1 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
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me007 Forum Guru Topics: 72 Posts: 781	Apr 22, 2007 - 10:46 AM       #2 assuming that most vulnerable to ischemia area is hippocampus - pca - D.
SILVER DoWhatYouGotToDo! Topics: 56 Posts: 1289	Apr 22, 2007 - 11:05 AM       #3 D
mytime Go Marching in! Topics: 40 Posts: 3161	Apr 22, 2007 - 11:49 AM       #4 C. major supply to brain, surface area.
forumdoctor Forum Senior Topics: 13 Posts: 118	Apr 22, 2007 - 1:32 PM       #5 C, middle cerbral artery.
forumdoctor Forum Senior Topics: 13 Posts: 118	Apr 22, 2007 - 8:02 PM       #6 new_n_post what is the answer.
Mikeland Forum Senior Topics: 24 Posts: 107	Apr 22, 2007 - 8:06 PM       #7 "C" most area of isque..
NNL Awaitin The Unexpected Topics: 779 Posts: 6613	Apr 22, 2007 - 8:22 PM       #8 Its a Simple Question of Anatomy The correct answer is C. The circle of Willis is a series of arterial anastomoses that circle around the pituitary stalk at the ventral surface of the brain. If any of the vessels of the circle of Willis become blocked, blood can be routed through the remaining vessels. The object of this question is to determine which vessel does not belong to the circle of Willis. Of the options listed, only the middle cerebral artery does not belong to the circle, and instead courses laterally to supply the entire lateral convexity of the brain. Therefore, ligation of this vessel would produce the most ischemic damage.
Jackofknives Cuddle bear inside Topics: 101 Posts: 890	Apr 22, 2007 - 8:53 PM       #9 Yea agreed. They do this kind of research, among others, in columbia. First remove an eye, then ligate 3 major arteries. but ofc middle cerebral is ligated. This kind of research is very cruel though.
NNL Awaitin The Unexpected Topics: 779 Posts: 6613	Apr 22, 2007 - 9:14 PM       #10
lq2006 Forum Elite Topics: 42 Posts: 379	May 20, 2007 - 3:53 PM       #11 C

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