circulacion cerebral

Question 1

from which pair of arteries fo the arteries supplying the brain arise from?

Answer 1

• Vertebrals: arise from the subclavian in the neck, ascend through the transverse foramina of the cervical vertebrae, and enter the foramen magnum of the skull to supply the posterior portion of the brain.
• Internal carotids: arise from the common carotid in the neck, ascend in the neck to enter the carotid canal, and traverse the foramen lacerum to terminate as the middle and anterior cerebral arteries, which anastomose with the circle of Willis around the optic chiasm, hypophysis, and basal hypothalamus

Question 2

course and structures supplied by the vertebral artery

Answer 2

from subclavian artery

supplies cerebellum

Question 3

course and structures supplied by the posterior inferior cerebellar artery

Answer 3

from vertebral artery

goes to posteroinferior cerebellum

Question 4

course and structures supplied by the basilar artery

Answer 4

from both vertebrals

goes to brainstem, cerebellum, cerebrum

Question 5

course and structures supplied by the anterior inferior cerebellar artery

Answer 5

from basilar

supplies inferior cerebellum

Question 6

course and structures supplied by the superior cerebellar artery

Answer 6

from basilar

supplies superior cerebellum

Question 7

course and structures supplied by the posterior cerebral artery

Answer 7

from basilar

supplies inferior cerebrum, occipial lobe

Question 8

course and structures supplied by the posterior communicating artery

Answer 8

it’s part of the cerebral arterial circle of Willis

Question 9

course and structures supplied by the internal carotid artery

Answer 9

from common carotid

supplies cerebral lobes and eye

Question 10

course and structures supplied by the middle cerebral artery

Answer 10

from internal carotid

goes to lateral aspect of cerebral hemispheres

Question 11

course and structures supplied by the anterior communicating artery

Answer 11

it’s part of the cerebral arterial circle of Willis

Question 12

course and structures supplied by the anterior cerebral artery

Answer 12

from internal carotidgoes to cerebral hemispheres (except occipital lobe)

Question 13

what happens when there is an occlusion of the anterior cerebral artery

Answer 13

it can disrupt sensory and motor functions on the contralateral lower extremity

Question 14

what happens when there is an occlusion of the middle cerebral artery

Answer 14

it can disrupt sensory and motor functions on the contralateral upper extremity or, if the internal capsule is affected, the entire contralateral body

Question 15

what happens when there is an occlusion of the posterior cerebral artery

Answer 15

it can disrupt visual functions from the contralateral visual field