(E1) 7 - Vasculature of the CNS

Question 1

What is the anterior circulation provided by? (of the brain)

Answer 1

Internal Carotid A.

Question 2

What is the posterior circulation provided by? (of the brain)

Answer 2

Vertebral A.

Question 3

What structures does the vertebral artery supply?

Answer 3

Question 4

Describe the pathway of the Vertebral Artery

Answer 4

Question 5

List and Describe the parts of the internal carotid and what it supplies there.

Answer 5

Question 6

Ophthalmic artery
comes off just distal to______________

Answer 6

cavernous sinus

Question 7

What are the branches of the Ophthalmic artery?

Answer 7

Central Artery of the Retina
Supraorbital and Supratrochlear A.

Question 8

What parts of the brain does anterior circulation supply?

Answer 8

Frontal, parietal, and temporal lobes

Question 9

What artery branches off of the internal carotid and supply parts of the anterior circulation?

Answer 9

Middle Cerebral arteries

Question 10

What two arteries supply parts of the anterior circulation?

Answer 10

Anterior and Middle Cerebral Arteries

Question 11

What is posterior circulation also referred to as?

Answer 11

Vertebrobasilar

Question 12

What two arteries form the basilar artery?

Answer 12

Vertebral arteries

Question 13

Where do the vertebral arteries supply blood?

Answer 13

Medulla
Cerebellum
Dura of post cranial fossa

Question 14

Where do the basilar arteries supply blood?

Answer 14

Pons
Occipital Lobe
Temporal Lobe
Brainstem
Cerebellum

Question 15

Branch and Supply for Posterior Cerebral Artery

Answer 15

Question 16

What is the significance of the circle of Willis?

Answer 16

Anastomosis connecting anterior and posterior circulation

Anomalies are very common

Question 17

What is the function of the Circle of Willis?

Answer 17

Provide an alternative route of blood flow if you have a blockage.

Question 18

At the point of connection between the anterior cerebral A. and the internal carotid A.,
the lateral continuation of the ICA becomes the ________________

Answer 18

middle cerebral artery (MCA)

Question 19

____________ connects anterior cerebral artery of both hemispheres

Answer 19

Anterior communicating artery

Question 20

____________ connects the middle cerebral artery (IC) and posterior cerebral arteries

Answer 20

Posterior communicating artery

Question 21

What are the spinal cord arteries?

Answer 21

• Anterior spinal artery
• Paired Posterior Spinal Arteries

Question 22

Where does the anterior spinal artery run?

Answer 22

Anterior median fissure

Question 23

Where do the posterior spinal arteries run?

Answer 23

On each side of the posterolateral sulcus

Question 24

What do the posterior spinal arteries supply blood to?

Answer 24

Posterior columns

Question 25

What do the anterior spinal arteries supply blood to?

Answer 25

Primary blood supply anterior 2/3

Question 26

Ant and Post spinal arteries are joined by segmental branches through the ___________

Answer 26

intervertebral foramen

Question 27

_________ arteries (lumbar & intercostals) bifurcate into_______ branches that supply the nerve root

Answer 27

Segmental radicular

Question 28

Where do segmental arteries come off of?

Answer 28

Lumbar and Intercostals

Question 29

Describe Ischemia )what it can lead to and type)

Answer 29

Question 30

What is an infarction?

Answer 30

Tissue death due to long term ischemia

Question 31

What is a transient ischemic attack?

Answer 31

- brief reduction in blood flow - transient neurological signs (ministroke)

Question 32

What is a hemorrhagic stroke?

Answer 32

Arterial rupture