Day 10 & 11 (Vertebral foramen)

Question 1

What is the location and number of medullary feeder arteries present in the adult?

Answer 1

9 anterior and 12 posterior medullary feeder arteries

Question 2

What is the name given to the artery which lies in front of the spinal cord along its length?

Answer 2

anterior spinal artery

Question 3

The anterior spinal artery is a branch of which artery?

Answer 3

the vertebral artery

Question 4

Is the anterior spinal artery a single, continuous artery along the spinal cord?

Answer 4

no

Question 5

As the anterior spinal artery continues along the spinal cord, which arteries unite along its length to give the appearance of a single continuous vessel?

Answer 5

anterior medullary feeder arteries

Question 6

The posterior spinal artery is a branch of which artery?

Answer 6

the posterior inferior cerebellar artery

Question 7

What is the position of the posterior spinal artery relative to the spinal cord?

Answer 7

it lies in the posterolateral sulcus along the spinal cord

Question 8

Is the posterior spinal artery a single, continuous artery along the spinal cord?

Answer 8

no

Question 9

As the posterior spinal artery continues along the spinal cord, which arteries unite along its length to give the appearance of a single continuous vessel?

Answer 9

posterior medullary feeder arteries

Question 10

What forms the arterial vasa corona above C3?

Answer 10

right and left anterior spinal arteries, right and left posterior spinal arteries, and 4 communicating arteries

Question 11

What forms the arterial vasa corona below C6?

Answer 11

a median anterior spinal artery, right and left posterior spinal arteries, and 3 communicating arteries

Question 12

What is the generic name given to arteries which penetrate the spinal cord?

Answer 12

intramedullary arteries

Question 13

What are the intramedullary branches of the arterial vasa corona?

Answer 13

pial perforating arteries, central/ventral/sulcal perforating arteries

Question 14

What arterial vasa corona branches supply gray matter and most of the spinal cord?

Answer 14

ventral/central/sulcal perforating arteries

Question 15

What intramedullary branches supply about one third of the spinal cord?

Answer 15

pial perforating arteries

Question 16

What is the source for pial perforating arteries?

Answer 16

the pial plexus

Question 17

What is the primary artery supplementing the arterial vasa corona?

Answer 17

anterior medullary feeders and posterior medullary feeders

Question 18

What vessels drain the spinal cord?

Answer 18

pial veins

Question 19

What will pial veins drain into?

Answer 19

venous vasa corona

Question 20

Which vessels form the venous vasa corona?

Answer 20

right and left anterior longitudinal veins, right and left posterior longitudinal veins, and 4 communicating veins

Question 21

Which vessels will drain the venous vasa corona?

Answer 21

anterior medullary veins, posterior medullary veins

Question 22

What vessel will drain the dorsal/posterior nerve root ganglion?

Answer 22

posterior radicular veins

Question 23

What veins are observed in the epidural space near the posterior longitudinal ligament?

Answer 23

anterior internal vertebral venous plexus, basivertebral vein

Question 24

What veins are observed in the epidural space near the ligamentum flavum?

Answer 24

posterior internal vertebral venous plexus

Question 25

What venous vessels are identified in the intervertebral foramen?

Answer 25

intervertebral veins

Question 26

Identify the meninges of the spinal cord (spinal medulla or medula spinalis).

Answer 26

dura mater, arachnoid mater pia mater

Question 27

What is the name given to the fluid withing the epidural space?

Answer 27

interstitial fluid

Question 28

Which meningeal space is now thought to be a potential space, not an actual space?

Answer 28

subdural space- between the dura mater and the arachnoid mater

Question 29

Which of the contents of the epidural space are more likely located near or around the posterior longitudinal ligament?

Answer 29

anterior spinal canal artery & plexus anterior internal vertebral venous plexus basivertebral vein recurrent meningeal/sinu-vertebral/sinus vertebral nerve Hoffman/anterior dural/meningovertebral ligaments

Question 30

What is the name given to the fluid present within the subdural space?

Answer 30

serous fluid

Question 31

What is the name given to the fluid with the subarachnoid space?

Answer 31

cerebrospinal fluid