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vascular 1: FINAL

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a circle of vessels that lie at the base of the brain connecting the anterior and posterior circulatory systems

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Terms in this set (60)

a circle of vessels that lie at the base of the brain connecting the anterior and posterior circulatory systems

the circle of willis

there is a "normal" circle of willis only ____-____% of the time

The Circle of Willis provides an important collateral pathway In cases of ________

stenosis or occlusion

the ANTERIOR circulatory system consists of what ?

carotid arteries and their branches

the POSTERIOR circulatory system consists of what?

vertebrobasilar arteries and their branches

an accessory blood pathway developed through enlargement of secondary vessels after obstruction of a main channel

collateral pathway

the vertebral artery arises from the _____________ artery

the Vertebral artery continues superiorly and medial from its origin to join contralateral vertebral artery to form the ___________ artery

what forms the union of the two intracranial vertebral arteries?

the basilar artery is _____cm long

the basilar artery extends __________ from is origin

anteriorly/superiorly

when the basilar artery terminates it-

Divides into 2 posterior cerebral arteries

the posterior cerebral artery (PCA) perfuses the __________ hemispheres of the brain

posterior (occipital lobe)

how many segments is the posterior cerebral artery divided into?

what segments of the PCA are seen in the TRANSCRANIAL DOPPLER?