Brain blood supply

Question 1

Order of the anterior circulation of the brain:

Answer 1

Right: L ventricle  Ascending Aorta  Brachiocephalic A.  R Common Carotid A.  R Internal Carotid A. ​

Left: L ventricle  Ascending Aorta  Aortic Arch  L Common Carotid A.  L Internal Carotid A.

Question 2

Order of the posterior circulation of the brain:

Answer 2

Right: L ventricle  Ascending Aorta  Brachiocephalic A.  R Subclavian A.  R Vertebral A. ​

Left: L ventricle  Ascending Aorta  Aortic Arch  L Subclavian A.  L Vertebral A.

Question 3

What are the two major branches of the anterior cerebral artery?

Answer 3

Pericallosal and Callasomarginal arteries

Question 4

Where does the ACA run? What does it supply?

Answer 4

Runs in longitudinal fissure above corpus callosum​

Supplies:​

Medial aspect of frontal and parietal lobes​

Cingulate cortex​

Corpus callosum

Question 5

What are the three divisions of the MCA?

Answer 5

Stem, superior division, and inferior division

Question 6

What does the MCA supply?

Answer 6

supplies 2/3rd of the cortex

Superior division: lateral frontal and parietal lobes

Inferior division: more temporal lobe (medial and lateral)

insular cortex

subcortical deep structures: basal ganglia, internal capsule, limbic structures

Question 7

Where does the anterior choroidal artery arise?

Answer 7

Off of the internal carotid artery close to the MCA

Question 8

What does the anterior choroidal artery supply?

Answer 8

Choroid plexus of lateral ventricle​

Optic tract​

Deep structures of telencephalon​

Posterior limb of internal capsule ​

Portions of basal ganglia​

Portions of thalamus

Question 9

What is the circle of willis described as?

Answer 9

An anastomosis between ICAs and Basilar artery

Question 10

What does the anterior communicating artery do?

Answer 10

Connects the two ACAs

Question 11

What does the posterior communicating artery do?

Answer 11

Connects MCAs to PCAs

also supplies diencephalon structures

pituitary, infundibulum, hypothalamus, thalamus

Question 12

Where does the posterior cerebral artery arise from and what does it supply?

Answer 12

arises from basilar artery and travels posteriorly to occiput

Question 13

What are the superficial branches of the PCA and what do they supply?

Answer 13

Anterior and Posterior Inferior Temporal A.’s, Calcarine A.’s​

Supplies:​

Medial and inferior occipital lobes​

Inferior temporal lobes ​

(memory and vision)

Question 14

What are the deep branches of the PCA and what do they supply?

Answer 14

Tuberothalamic A.’s, Thalamogeniculate A.’s, Posterior Choroidal A.’s​

Supplies:​

Subcortical structures: midbrain, thalamus, subthalamic structures

Question 15

(Vertebral artery branches) What does the PICA supply?

Answer 15

Arises at level of medulla​

Supplies:​

Lateral medulla​

Inferior cerebellum

Question 16

(Vertebral artery branches) What does the anterior spinal artery supply?

Answer 16

Supplies:​

Medial medulla ​

Anterior 2/3 of spinal cord

Question 17

(Vertebral artery branches) What do the posterior vertebral arteries supply?

Answer 17

Branches off PICA ​

Supplies:​

Dorsal medial medulla​

Posterior 1/3 of spinal cord

Question 18

(Basilar artery branches) Where does the AICA arise and what does it suppy?

Answer 18

Arises right after basilar artery forms at the level of the caudal pons ​

Supplies: ​

Lateral caudal pons​

Cerebellum (small region)

Question 19

(Basilar artery branches) Where do the labyrinthine arteries arise and what do they supple?

Answer 19

Branches from AICA ​

For some, arises directly off Basilar Artery​

Supplies: ​

Cochlea ​

Vestibular apparatus

Question 20

(Basilar artery branches) Where do the pontine arteries arise and what do they supply?

Answer 20

Small circumferential and arteries ​

Supplies:​

Rostral lateral Pons

Question 21

(Basilar artery branches ) Where do the Superior Cerebellar arteries arise and what do they supply?

Answer 21

Most rostral branch of basilar artery prior to the PCA ​

Supplies:​

Cerebellum​

Rostral dorsolateral Pons