Spinal Cord Vasculature

Question 1

Arteries supplying the spinal cord are branches of

Answer 1

Vertebral, ascending cervical, deep cervical, intercostal, lumbar, lateral sacral

Question 2

Three longitudinal arteries supply the spinal cord:

Answer 2

Anterior spinal artery

Paired posterior spinal arteries

Question 3

Arteries of spinal cord run longitudinally from the — to the — of the spinal cord

Answer 3

Medulla of brainstem

Conus medullaris

Question 4

This artery is formed by the union of the branches of the vertebral arteries and runs in the anterior median fissure

Answer 4

Anterior spinal artery

Question 5

The anterior spinal artery is a union of the branches of

Answer 5

Vertebral arteries

Question 6

These arteries arise from the anterior spinal artery and enter the spinal spinal cord through the fissure

Answer 6

Sulcal arteries

Question 7

The sulcal arteries supply approx. one third of the CSA of the spinal cord. True or False

Answer 7

False - two thirds

Question 8

Each posterior vertebral is a branch of either -

Answer 8

Vertebral artery of posteroinferior cerebellar artery

Question 9

The posterior spinal arteries commonly form anastomosing channels in the

Answer 9

Pia mater

Question 10

They can supply the short superior part of the spinal cord by themselves

Answer 10

Anterior and posterior spinal arteries

Question 11

Circulation to much of the spinal cord depends on which arteries running along the spinal nerve roots

Answer 11

Segmental medullary and radicular arteries

Question 12

These are derived from spinal branches of the ascending cervical, deep cervical, vertebral, posterior intercostal and lumbar arteries

Answer 12

Anterior and posterior segmental medullary arteries

Question 13

These arteries occur mainly in association with the cervical and lumbosacral enlargements, where the need for a good blood supply is greatest and enter through the IV foramina

Answer 13

Segmental medullary arteries

Question 14

This artery which is on the left side in about 65% of people reinforces the circulation to 2/3 of the spinal cord including lumbosacral enlargements

Answer 14

Great anterior segmental medullary artery

Question 15

This artery is much larger than the other segmental medullary arteries

Answer 15

Great anterior segmental medullary artery

Question 16

The great anterior medullary artery usually arises via a spinal branch from an —- and enters the vertebral column through the IV foramen at the —-

Answer 16

Inferior intercostal or upper lumbar artery

Lower thoracic and upper lumbar level

Question 17

Supplies the posterior and anterior roots of the spinal nerves and their coverings which run along the nerve roots

Answer 17

Posterior and anterior radicular arteries

Question 18

These arteries do not reach posterior, anterior, or spinal arteries

Answer 18

Radicular arteries

Question 19

What arteries replace the radicular arteries at the irregular levels at which they occur

Answer 19

Segmental medullary arteries

Question 20

Most radicular arteries are —and supply only the

Answer 20

Small

Nerve roots

Question 21

Some then may assist with the supply of the superficial parts of the gray mater in the posterior and anterior horns of the spinal cord

Answer 21

Radicular arteries

Question 22

True or False: The veins of the spinal cord have different distribution to that of the arteries

Answer 22

False same

Question 23

How many anterior and posterior veins are there

Answer 23

Three each

Question 24

The spinal veins are arranged

Answer 24

Longitudinally

Question 25

True or False: the spinal veins can communicate with each other freely

Answer 25

True

Question 26

The spinal veins are drained by up to how many anterior and posterior medullary and radicular veins

Answer 26

12

Question 27

What joins the veins of the spinal cord in the epidural space

Answer 27

Internal vertebral (epidural) venous plexuses

Question 28

The epidural venous plexus pass superiorly through the foramen magnum to communicate with

Answer 28

Dural sinuses and vertebral veins in the cranium

Question 29

True or False: The internal vertebral venous plexuses communicate with the external vertebral venous plexuses on the external surface of the vertebrae

Answer 29

True

Question 30

Most proximal spinal nerves are accompanied by what arteries

Answer 30

Radicular They do not reach posterior or anterior spinal arteries

Question 31

Occurs regularly in place of radicular arteries

Answer 31

Segmental arteries

Question 32

They are really just larger vessels that make it all the way to the spinal nerves

Answer 32

Segmental arteries