Day 10 & 11 (Vertebral foramen) Flashcards
What is the location and number of medullary feeder arteries present in the adult?
9 anterior and 12 posterior medullary feeder arteries
What is the name given to the artery which lies in front of the spinal cord along its length?
anterior spinal artery
The anterior spinal artery is a branch of which artery?
the vertebral artery
Is the anterior spinal artery a single, continuous artery along the spinal cord?
no
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?
anterior medullary feeder arteries
The posterior spinal artery is a branch of which artery?
the posterior inferior cerebellar artery
What is the position of the posterior spinal artery relative to the spinal cord?
it lies in the posterolateral sulcus along the spinal cord
Is the posterior spinal artery a single, continuous artery along the spinal cord?
no
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?
posterior medullary feeder arteries
What forms the arterial vasa corona above C3?
right and left anterior spinal arteries, right and left posterior spinal arteries, and 4 communicating arteries
What forms the arterial vasa corona below C6?
a median anterior spinal artery, right and left posterior spinal arteries, and 3 communicating arteries
What is the generic name given to arteries which penetrate the spinal cord?
intramedullary arteries
What are the intramedullary branches of the arterial vasa corona?
pial perforating arteries, central/ventral/sulcal perforating arteries
What arterial vasa corona branches supply gray matter and most of the spinal cord?
ventral/central/sulcal perforating arteries
What intramedullary branches supply about one third of the spinal cord?
pial perforating arteries
What is the source for pial perforating arteries?
the pial plexus
What is the primary artery supplementing the arterial vasa corona?
anterior medullary feeders and posterior medullary feeders
What vessels drain the spinal cord?
pial veins
What will pial veins drain into?
venous vasa corona
Which vessels form the venous vasa corona?
right and left anterior longitudinal veins, right and left posterior longitudinal veins, and 4 communicating veins
Which vessels will drain the venous vasa corona?
anterior medullary veins, posterior medullary veins
What vessel will drain the dorsal/posterior nerve root ganglion?
posterior radicular veins
What veins are observed in the epidural space near the posterior longitudinal ligament?
anterior internal vertebral venous plexus, basivertebral vein
What veins are observed in the epidural space near the ligamentum flavum?
posterior internal vertebral venous plexus
What venous vessels are identified in the intervertebral foramen?
intervertebral veins
Identify the meninges of the spinal cord (spinal medulla or medula spinalis).
dura mater, arachnoid mater pia mater
What is the name given to the fluid withing the epidural space?
interstitial fluid
Which meningeal space is now thought to be a potential space, not an actual space?
subdural space- between the dura mater and the arachnoid mater
Which of the contents of the epidural space are more likely located near or around the posterior longitudinal ligament?
anterior spinal canal artery & plexus
anterior internal vertebral venous plexus
basivertebral vein
recurrent meningeal/sinu-vertebral/sinus vertebral nerve
Hoffman/anterior dural/meningovertebral ligaments
What is the name given to the fluid present within the subdural space?
serous fluid
What is the name given to the fluid with the subarachnoid space?
cerebrospinal fluid
