arteries of stroke

[coconut lime]

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at this point, one week before the exam, i feel like i'm having a breakdown....forgetting everything i've learned and nothing is making sense anymore! anyway, so i know the "arteries of stroke" are the lenticulostriates from the MCA, and they supply the internal capsule, caudate nucleus, putamen, and globus pallidus. blah blah blah. so why are these the most likely damaged during stroke? and what deficits will they cause? internal capsule causes sensory deficits, i think....but what about the other areas? HELP!

 

[Idiopathic]

I think it is because they are the weakest, suffer the most in cases of high BP, and have poor to no collateral circulation.

 

[nuclearrabbit77]

a majority (~80) of strokes are due to embolisms/thrombus that get lodged. the area where it lodges most frequently is at the lenticulostriate, which are small penetrating branches that come directly off the MCA. imagine a thrombus going up the internal carotid and then most likely going up the MCA and then getting lodged in a penetrating branch.

the deficits you'll see are going to be dependent on the regions it destroys. i.e., language areas,etc. you'd most probably expect to see motor/sensory deficits that would be contralateral due to the way the neural tracts run for this.