Lecture 12 (3/10) Flashcards Preview

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Flashcards in Lecture 12 (3/10) Deck (17):
1

Vertebral Artery (Overview)

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

2

Posterior Inferior Cerebellar Artery

A branch of the vertebral artery

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

3

Basilar Artery

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

4

Anterior Inferior Cerebellar Artery

A branch of the basilar artery

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

5

Superior Cerebellar Artery

A branch of the basilar artery

Supplies blood to the entire superior portion of the cerebellum

6

Labryrinthine Artery

A branch of the basilar artery

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

7

Pontine Artery

A branch of the basilar artery

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

8

Common Carotid Artery

One of two major sources of blood supply to the brain

Travels in the neck

Has two branches:
Internal Carotid
External Carotid

9

Internal Carotid Artery

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

10

Posterior Communicating Artery

Stems from the internal carotid artery

One of the components of the Circle of Willis

11

Ophthalmic Artery

Stems from the Internal Carotid Artery

Supplies blood to the eyes, specifically the retina

12

Anterior Communicating Artery

The connection between the two halves of the anterior cerebral artery

13

Circle of Willis (Overview)

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

14

Circle of Willis (Function)

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

Anterior cerebral artery
Middle cerebral artery
Posterior cerebral artery

15

Anterior Cerebral Artery

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

Supplies blood to the medial surface of the brain

16

Middle Cerebral Artery

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.

17

Posterior Cerebral Artery

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