Arterial supply Flashcards
Where does the arterial supply for the spinal cord comes from?
3 main arteries:
1 single anterior spinal artery
2 paired posterior spinal arteries
Where is the anterior spinal artery located?
along the anterior median fissure
What supplies the anterior medial artery?
vert arteries
reinforced segmentally by anterior segmental medullary arteries
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
Which reinforcing artery is the largest?
great anterior segmental medullary artery (of Ademkiewicz)
What does thegreat anterior segmental medullary artery (of Ademkiewicz) supply?
The anterior 2/3 of the cross sectional area of the spinal
From where doe thegreat anterior segmental medullary artery (of Ademkiewicz) arise?
low intercostal or high limber arteries on the left side of the body
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
Where does the posterior spinal arteries arise from?
vert arteries or branches on the same side
reinforced by posterior segmental medullary arteries
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
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
What is the venues drainage?
3 anterior spinal veins and 3 posterior spinal veins that form a anastomostic plexus around the spinal cord
Where do the 3 anterior spinal veins and the 3 posterior spinal veins drain into?
internal vertebral venous plexus within the epidural space
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
