Cerebral Vasculature Flashcards
(29 cards)
What are the four parts of the internal carotid artery?
The cervical, the petrous, the cavernous, and the cerebral.
What branches does the internal carotid give off after exiting the cavernous sinus?
The ophthalmic artery, the anterior choroidal artery, and the posterior communicating artery.
What does the ophthalmic artery supply?
The eye and orbit.
What does the anterior choroidal artery supply?
The optic tract, choroid plexus, thalamus, and part of the internal capsule.
What does the posterior communicating artery do?
It connects the posterior cerebral arteries (from the vertebral) to the internal carotid and circle of willis. Supplies the hypothalamus and ventral thalamus.
What does the internal carotid do after giving off branches after exiting the cavernous sinus?
It bifurcates.
What does the internal carotid give off after bifurcating?
It forms the anterior cerebral artery (ACA) and middle cerebral artery (MCA).
What does the anterior cerebral artery (ACA) supply?
The medial portions of the frontal and parietal lobes, the olfactory bulb/tract, and motorsensory cortices for the contralateral leg and foot.
What does the middle cerebral artery (MCA) supply?
The lateral portion of the cerebral hemisphere, including Broca’a area, Wernicke’s area, and motor-sensory cortices of the contralateral trunk/arm/face.
What do the vertebral arteries give off before merging into the basilar artery?
The anterior spinal, the posterior spinal, and posterior inferior cerebellar artery (PICA).
What does the anterior spinal artery supply?
The anterior 2/3 of the spinal cord as well as part of the inferior medulla.
What does the posterior spinal artery supply?
The posterior spinal cord.
What does the posterior inferior cerebellar artery (PICA) supply?
The inferior cerebellum and lateral medulla.
What does the basilar artery give off?
The anterior inferior cerebellar artery (AICA), the superior cerebellar, and pontine arteries.
What does the anterior inferior cerebellar artery (AICA) supply?
The anterior/inferior cerebellum and inferior part of the pons.
What does the superior cerebellar artery supply?
The superior cerebellum and part of the midbrain and pons.
What do the pontine arteries supply?
The pons as well as the inner ear through the labyrinthine artery.
After giving off the aforementioned branches, what does the basilar artery do?
It bifurcates.
What does the basilar artery bifurcate into?
The posterior cerebral arteries (PCA).
What do the medial cerebral arteries supply? (Eastwood definition)
The insula, most of the lateral hemisphere, and some deep structures.
What is the insula?
A deep cortex located within the lateral sulcus (separating the temporal lobe from the frontal and parietal).
What are the lenticulostriate arteries?
Perforating arteries of the MCA that supply the basal ganglia and internal white matter.
What is the blood supply of the basal ganglia and internal white matter?
The lenticulostriate arteries (LSA) and Medial striate arteries (MSA, branch off the anterior cerebral artery/ACA).
What are lenticulostriate arteries commonly involved with?
Strokes.
