Blood Supply To The Brain Flashcards
What arteries provide 80% of the brain?
The internal carotid arteries
What arteries provide 20% of the brain
The vertebral arteries
What parts of the brain do the internal carotid arteries supply>
- most of the telencephalon
- much of the diencephalon
What parts of the brain do the vertebral arteries supply?
- the brain stem
- the cerebellum
- parts of the diencephalon
- the spinal cord
- occipital and temporal lobes
The internal carotid artery is a continuation of what artery?
The common carotid artery
Where does the internal carotid artery veer anteriorly?
At the temporal bone
What is the small branch the internal carotid artery gives off in the carotid canal?
Ramus caroticotimpanicus
What does the internal carotid artery enter the skull through?
The carotid canal
The internal carotid artery passes through___________ and the _____________ at the base of the skull
Passes through the cavernous sinus and the subarachnoid space
The ophthalmic branch of the internal carotid artery leaves the skull through what?
The superior optic foramen
The ophthalmic branch of the internal carotid artery gives rise to what artery?
The central retinal artery
What are the two smaller branches the internal carotid artery gives rise to?
- anterior choroidal artery
- posterior communicating artery
The continuation of the internal carotid artery is called what?
The middle cerebral artery
As the two anterior cerebral arteries enter the longitudinal fissure, they are connected by what?
The anterior communicating artery
The anterior cerebral artery curves around __________ to supply __________________
Curves around the corpus callosum to supply the medial parts of the frontal and parietal lobes
The anterior cerebral artery continues as what artery?
The pericallosal artery
Occlusion of an ACA causes restricted contralateral motor and somatosensory deficits affecting what?
The leg more than any other part of the body
The middle cerebral artery proceeds posteriorly in what?
The lateral sulcus
The middle cerebral artery emerges from the lateral sulcus to supply what?
Most of the lateral surface of the cerebral hemisphere
Occlusion of the MCA causes major motor and somatosensory deficits in what?
The upper body and head