Week 2: Central Nervous System Vascular Structures Flashcards
What is the anterior circulation of the right vasculature?
L ventricle to ascending aorta to brachiocephalic A. to R common carotid A. to R internal Carotid artery to
What is the anterior circulation of the left vasculature?
L ventricle to ascending aorta to aortic arch to L common carotid a. to L internal carotid a.
What is the posterior circulation of the R vasculature?
L ventricles to ascending aorta to brachiocephalic artery to r. subclavian artery to right vertebral artery
what is the posterior circulation of the left vasculature?
Left ventricle to ascending aorta to aortic arch to L subclavian A. to L vertebral artery
What are the components of anterior circulation?
anterior cerebral artery middle cerebral artery anterior choroidal artery anterior communicating artery posterior communicating ophthalmic artery
What artery runs in the longitudinal fissure above the corpus callosum?
the anterior cerebral artery
The anterior cerebral artery supplies:
the medial aspect of the frontal and parietal lobes
the cingulate cortex
corpus callosum
What are the 2 major branches of the anterior cerebral artery?
the callosomarginal artery
the pericallosal artery
Which artery supplies 2/3rds of the cortex?
the middle cerebral artery (MCA)
What are the 3 divisions of the middle cerebral artery ?
The stem
Superior Divisions
Inferior divisions
What arteries are associated with the stem division of the middle cerebral artery?
lenticulostriate arteries
What does the middle cerebral artery supply?
lateral frontal lobe lateral parietal lobe insular cortex medial and lateral temporal lobes subcortical deep structures such as the basal ganglia, internal capsule, and limbic structures
What are the deep structures that are supplied by the middle cerebral artery?
basal ganglia, internal capsule and limbic structures
What artery rises off of the internal carotid artery close to where the MCA arises?
The anterior choroidal artery
what does the anterior choroidal artery supply?
the choroid plexus of the lateral ventricle
optic tract
deep structures of telencephalon such as:
———–posterior limb of the internal capsule
———–portions of the basal ganglia
———–portions of the thalamus
What are the deep structures of the telencephalon that are supplied by the anterior choroidal artery?
posterior limb of internal capsule
portions of basal ganglia
portions of the thalamus
What is an “anastomosis between internal carotid arteries and the basilar artery?”
The Circle of Willis
The circle of Willis is an _____________ between ICAs and basilar artery.
anastomosis
What is the function of the circle of Willis?
Provides collateral blood flow between anterior and posterior circulations of brain as well as right and left hemispheres.
A full-caliber ring is present in only ____% of individuals?
34%
What are the 4 components of the circle of Willis?
- anterior cerebral arteries
- anterior communicating artery
- posterior communicating artery
- posterior cerebral arteries
What does the anterior communicating arteries connect?
The 2 anterior cerebral arteries
What does the posterior communicating arteries connect?
the middle coronal arteries to the posterior cerebral arteries.
The posterior communicating arteries supply the diencephalon structures such as:
pituitary gland, infundibulum, hypothalamus, thalamus
What are the 8 components of posterior circulation?
- posterior cerebral arteries
- basilar artery
- superior cerebellar arteries
- labyrinthine arteries
8 vertebral arteries - anterior inferior cerebellar arteries
- posterior inferior cerebellar arteries
- anterior spinal arteries
The posterior cerebral arteries arise from the __________ artery and travels posteriorly to the _____________.
basilar; occiput
The superficial branches of the posterior circulation includes the:
anterior inferior temporal arteries
posterior inferior temporal arteries
calcarine arteries
The superficial branches of the posterior cerebral artery supplies what structures?
medial and inferior occipital lobes
inferior temporal lobes
The medial and inferior occipital lobes and the inferior temporal lobes are supplied by the ___________ branches of the ___________ cerebral artery/
superficial; posterior
What are the deep branches of the posterior cerebral artery?
tuberothalamic artery
thalamogeniculate artery
posterior choroidal arteries
What do the deep branches of the posterior cerebral artery supply?
subcortical structures: midbrain, thalamus, subthalamic structures