Vertebral Foramen Flashcards
At what level will the spinal cord typically terminate?
L1
What typical shape/outline of the vertebral foramen at each region of the spinal column/vertebral column?
cervical- triangular; thoracic - oval; lumbar - triangular; sacrum - triangular
At what level will the dural sac typically terminate?
S2
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 sacrum?
the iliolumbar artery, lateral sacral artery and median (middle) sacral artery
What segmental levels are supplied by the vertebral artery?
c1-c6
What segmental levels are supplied by the ascending cervical artery?
c1-c6
What segmental level(s) is/are supplied by the subcostal artery?
T12
What branch of the segmental artery supplied the vertebra and the paravertebral region?
dorsospinal artery
Which artery is primarily observed in the distal part of the intervertebral foramen?
spinal artery
which branch of the dorsospinal artery will penetrate the meninges to enter subarachnoid space?
spinal artery
What are the branches of the spinal artery?
osseous arteries, anterior spial canal artery, posterior spinal canal artery, anterior medullary feeder artery, posterior medullary feeder artery, anterior radicular artery, posterior radicular artery
Which branches of the spinal artery supply the contents of the epidural space?
osseous arteries, anterior spinal canal artery, posterior spinal canal artery
What arteries are observed in the epidural space near the posterior longitudinal ligament?
anterior spinal canal artery and plexus
What arteries are observed in the epidural space near the ligamentum flavum?
posterior spinal canal artery and plexus
Which branches of the spinal artery supply the contents of the subarachnoid space?
anterior radicular artery, posterior radicular artery, anterior medullary feeder artery, posterior medullary feeder artery
Which vessel will supply the dorsal/posterior rootlets, nerve root and nerve root ganglion?
posterior radicular artery
Which vessel will supply the ventral/anterior nerve rootlet and nerve root?
anterior radicular artery
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 intramedullary branches supply about one third of the spinal cord?
pial perforting arteries
what arterial vasa corona branches supply gray matter and most of the spinal cord?
ventral/central/sulcal 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 medullar feeders
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 that lies in front of the spinal 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 the 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 vessels drain the spinal cord?
pail 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 ven
what veins are observed in the epidural space near the ligamentum flavum?
posterior internal vertebral venous plexus
what venous vessels are identified int he intervertebral foramen?
intervertebral veins
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
Hofmann/ anterior dural/miningovertebral ligaments
what is the name given to the fluid with the subarachnoid space?
cerebrospinal fluid
What is the name given to the fluid present within the subdural space?
serous flid
what is the name given to the lateral extension of pia mater along the spinal cord?
dentate (denticulate) ligament
What is the unique feature of veins along the spinal canal?
they lack the bicuspid valve of typical veins?
