Vasculature of the Spine (Quiz 2)

Question 1

The spinal cord is supplied by ______________ arteries and 3 longitudinal arteries

Answer 1

segmental

Question 2

The spinal cord is supplied by segmental arteries and 3 longitudinal arteries. What are the 3 longitudinal arteries?

Answer 2

one anterior spinal artery and 2 posterior spinal arteries

Question 3

What are the segmental arteries called that arise off the subclavian arteries in the cervical region?

Answer 3

-vertebral arteries
-ascending cervical arteries
-deep cervical arteries

Question 4

What are the segmental arteries called that arise directly off the aorta in the THORACIC region?

Answer 4

posterior intercostal arteries

Question 5

What are the segmental arteries called that arise directly off the aorta in the LUMBAR region?

Answer 5

lumbar arteries

Question 6

What are the segmental arteries called that arise directly off the aorta in the SACRAL region?

Answer 6

lateral sacral arteries

Question 7

One anterior spinal artery and two posterior spinal arteries run down the spinal cord from the _____________________ to the __________________

Answer 7

medulla oblongata, conus medullaris

Question 8

The longitudinal arteries provide blood directly to the spinal cord and are formed by branches of the vertebral artery. The posterior spinal arteries (2/3 of the longitudinal arteries) can also arise from the….

Answer 8

posterior inferior cerebellar artery

Question 9

The anterior spinal artery runs inferiorly in the _________________ fissure and gives rise to ___________ arteries

Answer 9

anterior median, sulcal

Question 10

Which artery provides the major blood supply directly to the spinal cord (supplies approx. 2/3 of the cross-sectional area of the spinal cord)?

test q

Answer 10

anterior spinal artery

Question 11

Spinal branches arise off ______________ arteries and follow spinal nerves through the IVF

Answer 11

segmental

Question 12

Spinal branches bifurcate into….

Answer 12

-anterior and posterior segmental medullary arteries
-anterior and posterior radicular arteries

Question 13

Where do the anterior and posterior segmental medullary arteries feed into?

Answer 13

anterior longitudinal artery

Question 14

Anterior and posterior spinal arteries can supply only the ____________ part of the spinal cord by themselves

Answer 14

short superior

Question 15

Blood circulation to much of the spinal cord depends on which arteries?

Answer 15

segmental medullary arteries

Question 16

Anterior and posterior medullary arteries arise off the spinal branches of major cervical and segmental arteries to merge with the….

Answer 16

longitudinal spinal arteries

Question 17

Anterior and posterior medullary arteries feed/bring/supply blood to which arteries?

test q

Answer 17

spinal arteries

Question 18

What is the blood flow pathway for anterior and posterior medullary arteries?

test q

Answer 18

segmental a. > spinal branch > anterior and posterior medullary aa. > spinal aa.

Question 19

What is the blood flow pathway for anterior and posterior radicular arteries?

test q

Answer 19

segmental a. > spinal branch > anterior and posterior radicular aa.

Question 20

Anterior and posterior radicular arteries arise off of spinal branches of major cervical and segmental arteries. Where do they supply blood to?

test q

Answer 20

anterior and posterior spinal nerve roots and their coverings

Question 21

What is the largest anterior segmental medullary artery called?

Answer 21

great anterior segmental medullary artery of Adamkiewicz

Question 22

Where is the great anterior segmental medullary artery of Adamkiewicz located?

Answer 22

anterior aspect of the lumbosacral cord enlargement (on the left side for 65% of people)

Question 23

Which artery reinforces circulation to 2/3rd of the spinal cord?

Answer 23

great anterior segmental medullary artery of Adamkiewicz

Question 24

Where does the great anterior segmental medullary artery of Adamkiewicz typically arise from?

Answer 24

spinal branches of
-inferior posterior intercostal arteries OR
-upper lumbar segmental arteries

Question 25

The segmental arteries send equatorial and periosteal branches to supply the....

Answer 25

vertebral body

Question 26

The anterior vertebral canal branches send nutrient arteries to supply.... test q

Answer 26

red marrow of vertebral bodies

Question 27

Posterior branches of segmental arteries send _____________ and ___________ arteries to supply the vertebral arch structures

Answer 27

periosteal, nutrient

Question 28

T/F: venous drainage parallels the arterial supply

Answer 28

true

Question 29

T/F: spinal veins run longitudinally down the length of the spinal cord following the spinal arteries

Answer 29

true

Question 30

How many spinal veins are there?

Answer 30

-3 anterior spinal veins -3 posterior spinal veins

Question 31

What do the veins of the spinal cord form?

Answer 31

venous plexuses

Question 32

What are spinal veins drained by?

Answer 32

medullary and radicular veins (approx 12 veins)

Question 33

How many spinal venous plexuses are there? What are they?

Answer 33

4 -2 internal vertebral venous plexuses (anterior and posterior) -2 external vertebral venous plexuses (anterior aspect of vertebral bodies and posterior aspect of spinous processes)

Question 34

All 4 spinal venous plexuses communicate with each other through the...

Answer 34

intervertebral foramina

Question 35

Where do the basivertebral veins form within?

Answer 35

vertebral bodies (mostly posterior)

Question 36

What do basivertebral veins drain?

Answer 36

vertebral bodies, NOT the spinal cord

Question 37

Where do basivertebral veins drain into?

Answer 37

either -anterior internal venous plexus (mostly) -anterior external venous plexus

Question 38

Intervertebral veins travel through the IVF with spinal nerves and spinal branches of ____________ arteries

Answer 38

segmental

Question 39

Where do intervertebral veins receive venous blood from?

Answer 39

spinal cord veins and vertebral venous plexuses, specifically: -anterior and posterior medullary and radicular veins -all vertebral venous plexuses

Question 40

Where do intervertebral veins drain into?

Answer 40

-vertebral veins of the neck -segmental veins of the trunk

Question 41

What is the venous pathway of the spine?

Answer 41

spinal veins, venous plexuses, medullary veins, and radicular veins drain into > intervertebral veins> segemental veins > vena cava