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Flashcards in Arterial supply Deck (14)
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1

Where does the arterial supply for the spinal cord comes from?

3 main arteries:
1 single anterior spinal artery
2 paired posterior spinal arteries

2

Where is the anterior spinal artery located?

along the anterior median fissure

3

What supplies the anterior medial artery?

vert arteries
reinforced segmentally by anterior segmental medullary arteries

4

From where does the anterior segmental medullary arteries arise?

same as the posterior segmental medullary arteries: cervical arteries
intercostal arteries
lumbar arteries
lateral sacral arteries

5

Which reinforcing artery is the largest?

great anterior segmental medullary artery (of Ademkiewicz)

6

What does thegreat anterior segmental medullary artery (of Ademkiewicz) supply?

The anterior 2/3 of the cross sectional area of the spinal

7

From where doe thegreat anterior segmental medullary artery (of Ademkiewicz) arise?

low intercostal or high limber arteries on the left side of the body

8

What does thegreat anterior segmental medullary artery (of Ademkiewicz) give rise to?

sulcus arteries,
sulcus arteries enter the spinal cord through the anterior median fissure

9

Where does the posterior spinal arteries arise from?

vert arteries or branches on the same side
reinforced by posterior segmental medullary arteries

10

From where does the posterior segmental medullary arteries arise?

same asanterior segmental medullary arteriescervical arteries
cervical
intercostal arteries
lumbar arteries
lateral sacral arteries
they form an anastomose

11

Where does the nerve roots and the dorsal root ganglia receive arterial supply?

anterior radicalar arteries
which are branches of:
cervical arteries
intercostal arteries
lumbar arteries
lateral sacral arteries

12

What is the venues drainage?

3 anterior spinal veins and 3 posterior spinal veins that form a anastomostic plexus around the spinal cord

13

Where do the 3 anterior spinal veins and the 3 posterior spinal veins drain into?

internal vertebral venous plexus within the epidural space

14

Why can infection spread in any direction through out he veins?

because the venous system of the spinal cord is valveless. it communicates freely with the venous sinuses within the skull, the external vertebral venous plexus and segmental veins