Blood Supply to Brain Flashcards
The brain is supplied by what two arteries?
Internal carotid artery and Vertebral-basilar artery
What is the anterior blood supply of the brain?
Internal Carotid Artery
What is the posterior blood supply of the brain?
Vertebral-basilar artery
What are the major branches of the ICA?
- Anterior cerebral artery (ACA)
- Ophthalmic artery
- Middle cerebral artery (MCA)
- Posterior communicating artery
What are the major branches of the basilar artery?
- Posterior Cerebral Artery
- Pontine Arteries
- Superior Cerebellar Artery (SCA)
- Anterior Inferior Cerebellar Artery
Patient has posterior cerebral artery aneurysm which cranial nerve will be impinged?
CN III: Oculomotor N.
The ophthalmic artery travels through which foramen?
Optic Canal w/ the Optic N (CN: II)
The central artery of the retina is occuluded due to diabetes or a clot can cause________
blindness or vision problems
What connects the right and left cerebral arteries?
Anterior communicating arteries
The L&R anterior cerebral aa. supplies?
- anterior and middle portions of the corpus callosum
- olfactory bulb and tract
- medial parts of the frontal and parietal lobes
What is the largest branch of the ICA and most often occluded?
Middle Cerebral Artery (MCA)
What brain lobes does the MCA supply?
ONLY LATERAL ASPECTS: Frontal Parietal Temporal Occipital Insular
The Middle Cerebral Artery (MCA) arteries DOES NOT supply superolateral frontal and parietal lobes and inferior temporal lobes? T or F
True
Functions of the Posterior Communicating AA.?
Anastomose with the posterior cerebral aa. thus forming a connection between the anterior and posterior circulation
Arise from both vertebral arteries and the largest branch of the vertebral a.
Posterior Inferior Cerebellar AA. (PICA)
What does the posterior inferior cerebellar artery supply?
posterior cerebellum
inferior cerebellar
medulla
2 posterior spinal arteries arise from the PICA
-supply the posterior 1/3 of the spinal cord
What artery supplies the posterior inferior cerebellum?
posterior inferior cerebellar artery (PICA)
- Aries from both vertebral arteries
- Runs along the anterior median fissure of the spinal cord
- Continues inferiorly to supply anterior 2/3 of spinal cord
- medial medulla
Anterior Spinal Artery
- At the midbrain, it bifurcates into posterior cerebral arteries (terminal branches)
- supplies penetrating branches to the pons (pontine arteries)
- gives off anterior inferior cerebellar aa. and superior cerebellar arteries
Basilar artery
What makes up the 9 members of the Circle of Willis?
(1) Anterior Communicating Artery
(2) Internal Carotid Artery (ICA)
(2) Anterior Cerebral Artery
(2) Posterior Cerebral Artery (PCA)
(2) Posterior Communicating Artery
What artery supplies the anterior inferior cerebellum?
Anterior inferior cerebellar a. (AICA)
What artery supplies the superior cerebellum
Superior cerebellar artery
What does the basilar do at the midbrain?
it divides into posterior cerebral arteries
What CN is between the posterior cerebral artery and the superior cerebellar artery. If impinged it can cause Berry’s Anersyum (eye deficits)
impingement of CN III: (oculomotor)
The posterior cerebral arteries supply:
Midbrain
Occipital lobe (visual cortex)
Temporal lobe
Posterior Corpus Callosum
What are the 2 main branches of the vertebral artery?
Posterior Inferior Cerebellar Artery
Anterior Spinal Artery
What artery supplies the anterior and middle portion of the corpus callosum, olfactory bulb and tract, and medial parts of frontal and parietal lobe?
L/R Anterior Cerebral A.
