Blood Supply to and From CNS

Question 1

Blood supply to the spinal cord arises from what?

Answer 1

Question 2

What do radicular arteries do?

Answer 2

Travel along dorsal and ventral roots of spinal cord to reach the blood supply. “Radicule” means root

Question 3

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Question 4

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Question 5

Verterbal arteries are branches of what major artery?

What does it travel through to reach what?

Answer 5

Question 6

What are the arrows pointing to?

What is this area its going through called?

Answer 6

Question 7

Vertebral arteries enter the base of the skull through what?

What do they give rise to once they do?

Answer 7

Question 8

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Question 9

Anterior spinal artery supplies ___ of the spinal cord, including ____ horns, _____horns, ____ and ___ funiculi, ______, _______

Answer 9

Question 10

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Question 11

The posterior spinal arteries supply the posterior ___ of spinal cord, including:

Answer 11

Question 12

Where do anterior and posterior spinal arteries not extend? What do we need because of this?

Answer 12

Back up plan is segmental arteries, which provide blood supply to thoracic and lumbar levels

Question 13

Trace the path of segmental arteries. Where do they arise, what do they branch into, and what do these things anastomose into?

Answer 13

Question 14

Whats the main function of segmental arteries?

Answer 14

They provide main blood supply to spinal cord at thoracic and lumbar levels

Question 15

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Question 16

What is the special segmental artery between T5 and L3?

What’s its main job?

Answer 16

Question 17

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Question 18

The venous drainage of the spinal cord generally follow what pattern?

Blood passes from spinal veins to what?

Answer 18

Question 19

After blood passes into the epidural internal venous plexus (of Batson), where does it drain?

Answer 19

Question 20

What is special about the epidural internal venous plexus (of Batson) veins?

Answer 20

They are veins that permit bi-directional flow and serve as path for transmission of inectious agents and tumor cells

Question 21

What is this?

Answer 21

Epidural internal venous plexus (of Batson)

Question 22

What percentage of cardiac output goes to the brain?

What are the 2 pairs of vessels that the brain consists of?

Answer 22

Question 23

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Question 24

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Question 25

What does the internal carotid artery give rise to? 5 things

Answer 25

Question 26

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Question 27

What does the anterior cerebral artery supply? 3 things (what areas of motor and sensory cortex?)

Answer 27

3rd thing is anterior limb of internal capsule (via medial striate artery (recurrent artery of Heubner)

Question 28

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Question 29

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Question 30

Middle cerebral artery supplies what?3 things Also what part of motor and sensory cortex?

Answer 30

3rd thing is anterior and posterior limbs of internal capsule (via lenticulostriate arteries)

Question 31

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Question 32

The middle cerebral artery supplies the ___ and ___ limbs of the internal capsule via what arteries? What are these arteries prone to in what disease? Why?

Answer 32

Prone to hypertension because they are so small and long

Question 33

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Question 34

Vertebral arteries join to form the ___ artery. Branches of verterbral arteries include what?

Answer 34

Question 35

The posterior inferior cerebellar artery (PICA) gives rise to what?

Answer 35

Question 36

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Question 37

The basilar artery branches include: (3) arteries

Answer 37

Question 38

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Question 39

Posterior cerebral arteries form what branch of the basilar artery? They provide major blood supply to what region? Also 3 other structures

Answer 39

Question 40

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Question 41

What is the circle of Willis? Formed by what? (5) Gives off penetrating branches to what structures (3)

Answer 41

Question 42

What is an aneurysm? Where do Berry (saccular) aneurysms develop? Rupture is a common cause of what?

Answer 42

Question 43

What are watershed zones?

Answer 43

Question 44

What are superficial veins devoid of? Where do they lie? Where do they drain from? Where do they terminate? Where do they drain to?

Answer 44

Question 45

What does the laceration of superficial veins result in? How can this happen, and who's at risk? Will the sympoms come on quickly or slowly?

Answer 45

subdural hematoma It can happen when someone, such as an hold person, falls neurologic symptoms come on slowly over the course of several days

Question 46

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Question 47

Deep cerebral veins drain what kind of structues? Anterior cerebral veins and deep middle cerebral veins drain to what? Basal veins join ___ \_\_\_ veins to form ___ \_\_\_ of \_\_\_\_

Answer 47

Question 48

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Question 49

What artery supplies the spinal cord generally?

Answer 49

Branches of the vertebral arteries

Question 50

What artery supplies the dorsal columns of the spinal cord? (fine touch, vibration, position sense)

Answer 50

Posterior spinal artery

Question 51

What artery supplies the spinothalamic tract in the spinal cord?

Answer 51

Anterior spinal artery

Question 52

What artery supplies the medial lemniscus in the medulla?

Answer 52

Anterior spinal artery and paramedian branches of vertebral (switches blood supply because axons from dorsal colum nuclei trael ventral medial as they cross midline)

Question 53

What artery supplies the spinothalamic tract in the medulla?

Answer 53

PICA and circumferential branches of vertebral (in spinal cord the spinothalamic tract is located ventral lateral but assumes a more dorsal lateral position in the medulla)

Question 54

Branches of what supply the pons, generally?

Answer 54

Branches of the basilar artery

Question 55

In the caudal pons, what artery supplies the medial lemniscus?

Answer 55

Paramedian branches of the basilar (although it has moved dorsal in location it maintains a more medial position)

Question 56

In the caudal pons, what artery supplies the spinothalamic tract?

Answer 56

Circumfrential branches of basilar and AICA (because of more lateral location of this tract)

Question 57

In the mid to rostral pons, what artery supplies the medial lemniscus?

Answer 57

Oaramedian and circumfrential branches of the basilar (because ML has moved lateral and anatomically closer to the spinothalamic tract)

Question 58

In mid to rostral pons, what branches supply the spinothalamic tract?

Answer 58

circumferential branches of basilar (because of more lateral location of this tract)

Question 59

In mid brain, what branches generally supply this are?

Answer 59

Branches of the top of the basilar and proximal posterior cerebral arteries

Question 60

In midbrain, what arteries supply medial lemniscus and spinothalamic tract?

Answer 60

circumferential branches of the proximal posterior cerebral (because these pathwasy have moved more dorsal lateral)

Question 61

What does the posterior inferior cerebellar artery (PICA) give rise to? Also what does it supply blood to?

Answer 61

Gives rise to the posterior spinal artery, supplies dorsolateral medulla supplies inferior cerebellum and fourth ventricle, infererior cerebellar peduncle, spinothalamic tract