8/4 Questions Exam 1 Flashcards
What is the name given to the artery that 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 that 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 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 vessels 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
What is the unique feature of veins along the spinal canal?
they lack the bicuspid valve of typical veins
What is the locations and number of medullary feeder arteries present in the adult?
9 anterior and 12 posterior medullary feeder arteries
