Vascular supply of the brain in health and disease Flashcards
what are the branches of the aortic arch?
brachiocephalic trunk (splits into the right common common carotid artery and the right subclavian artery)
left common carotid
left subclavian artery
At what level do the common carotid arteries bifurcate?
C3-4
what are the different segments of the internal carotid artery from the neck upwards?
cervical
petrous
cavernous
supraclinoid (intradural)
describe the cervical ICA course
No narrowings/dilatations/branches
Anterior and medial to internal jugular vein
Lies posterior and lateral to ECA at origin
Ascends behind and then medial to ECA
describe the petrous ICA course
Penetrates temporal bone and runs horizontally (anteromedially) in the carotid canal
describe the cavernous ICA course
Turns superiorly at foramen lacerum.
Enters cavernous sinus (siphon)
Pierces dura at level of anterior clinoid process
Small branches supply dura, cranial nerves 3-6 and posterior pituitary
what structures does the superior hypophyseal artery supply?
the pituitary gland
the pituitary stalk
hypothalamus
optic chiasm
what structures does the anterior choroidal artery supply?
choroid plexus optic tract cerebral peduncle internal capsule medial temporal lobe
what are the two terminal branches of the internal carotid?
anterior cerebral artery and the middle cerebral artery
which parts of the brain do the lateral lenticulostriate arteries supply?
lentiform nucleus (putamen and globus pallidus) caudate nucleus internal capsule
what branches does the M1 section of the ICA give?
lateral lenticulostriate arteries
What structures doe the medial lenticolostriate arteries supply?
head of the caudate nucleus and the internal capsule
from which arteries do the vertebral arteries arise from?
the subclavian arteries
what structures do the extrcranial vertebral arteries supply?
back muscles spinal meninges (for the cervical spine) spinal cord (cervical segments) anastomoses with the external carotid branches
