Lecture 12 (3/10)

Question 1

Vertebral Artery (Overview)

Answer 1

One of two main sources of blood supply to the brain

Ascends in the cervical vertebral column and enters the cranial cavity through the foramen magnum

Arrives at the level of the medulla - it lies on the ventral side of the medulla

Question 2

Posterior Inferior Cerebellar Artery

Answer 2

A branch of the vertebral artery

Supplies blood to the medulla and to the posterior inferior portion of the cerebellum

Question 3

Basilar Artery

Answer 3

Formed by the two vertebral arteries joining

Found on the midline on the ventral surface of the pons

Has multiple branches:
Anterior inferior cerebellar artery
Labyrinthine Artery
Pontine Arteries

Question 4

Anterior Inferior Cerebellar Artery

Answer 4

A branch of the basilar artery

Supplies blood to parts of the medulla and pons and the anterior, inferior portion of the cerebellum

Question 5

Superior Cerebellar Artery

Answer 5

A branch of the basilar artery

Supplies blood to the entire superior portion of the cerebellum

Question 6

Labryrinthine Artery

Answer 6

A branch of the basilar artery

Supplies blood to the cochlea and the vestibular portions of the inner ear

Question 7

Pontine Artery

Answer 7

A branch of the basilar artery

Numerous small vesicles that supply blood to various areas of the pons

Question 8

Common Carotid Artery

Answer 8

One of two major sources of blood supply to the brain

Travels in the neck

Has two branches:
Internal Carotid
External Carotid

Question 9

Internal Carotid Artery

Answer 9

One branch of the Common carotid artery

Goes all the way into the brain

Arrives at the base of the brain at the level of the hypothalamus

Gives rise to:
Posterior communicating artery
Opthalamic artery

The L and R hemispheres of the internal carotid artery are joined together by the Anterior Communicating artery

Question 10

Posterior Communicating Artery

Answer 10

Stems from the internal carotid artery

One of the components of the Circle of Willis

Question 11

Ophthalmic Artery

Answer 11

Stems from the Internal Carotid Artery

Supplies blood to the eyes, specifically the retina

Question 12

Anterior Communicating Artery

Answer 12

The connection between the two halves of the anterior cerebral artery

Question 13

Circle of Willis (Overview)

Answer 13

Formed by the branches of the basilar artery and the internal carotid artery joining

Located around the base of the brain

Includes:
Posterior cerebral 
Posterior communicating
Internal carotid
Anterior cerebral 
Anterior communicating 

Connects the two arterial systems

Question 14

Circle of Willis (Function)

Answer 14

Contains 3 branches that supply blood to each of the cerebral hemispheres:

Anterior cerebral artery
Middle cerebral artery
Posterior cerebral artery

Question 15

Anterior Cerebral Artery

Answer 15

One of the 3 major branches that supply blood to each of the cerebral hemispheres

Supplies blood to the medial surface of the brain

Question 16

Middle Cerebral Artery

Answer 16

One of the 3 major branches that supply blood to each of the cerebral hemispheres

Goes into the lateral fissure and supplies blood to the lateral surface of the brain.

Question 17

Posterior Cerebral Artery

Answer 17

One of the 3 major branches that supply blood to each of the cerebral hemispheres

Supplies blood to the hemispheres/cortex

Has branches that supply blood to the midbrain, hypothalamus, thalamus, geniculate bodies, and the choroid plexus of the 3rd and lateral ventricles