Day 11 Flashcards
At what vertebral level will the dural sac typically terminate?
S2
At what vertebral level will the spinal cord typically terminate?
L1
What are the segmental arteries of the cervical spine?
the vertebral artery, ascending cervical artery and deep cervical artery
What are the segmental arteries of the thoracic spine?
the deep cervical artery, superior (highest) intercostal artery, posterior intercostal artery and subcostal artery
What are the segmental arteries of the lumbar spine?
the lumbar arteries, iliolumbar artery, lateral sacral artery and median (middle) sacral artery
What are the segmental arteries of the sacrum?
lateral sacral artery and median (middle) sacral artery
Which branch of the dorsospinal artery will penetrate the meninges to enter subarachnoid space?
spinal artery
What arteries are observed in the epidural space near the posterior longitudinal ligament?
anterior spinal canal artery & plexus
What arteries are observed in the epidural space near the ligamentum flavum?
posterior spinal canal artery & plexus
Which vessel will supple the ventral/anterior nerve rootlet and nerve root?
anterior radicular artery
Which vessel will supply the dorsal/posterior nerve rootlets, nerve root and nerve root ganglion?
posterior radicular artery
The anterior spinal artery is a branch of which artery?
the vertebral artery
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
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/sulcual 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 will pial veins drain into?
venous vasa corona
Which vessels from the venous vasa corona?
right and left anterior longitudinal veins, right and left posterior longitudinal veins, and 4 communicating veins
What veins are observed in the epidural space near the ligamentum flavum?
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
