Shared Flashcard Set

Details

Spinal Cord and Meninges
Cole 1/17/11 lecture
42
Anatomy
Undergraduate 4
01/20/2011

Additional Anatomy Flashcards

 


 

Cards

Term
dura mater, arachnoid mater, pia mater
Definition
list the meningeal layers
Term
dura mater
Definition
toughest, fibrous, most external meningeal layer
Term
arachnoid mater
Definition
fragile filmy layer of meninges, looks like red cellophane
Term
denticulate ligament
Definition
extension of the pia mater that helps stabilize the spinal cord
Term
pia mater
Definition
meningeal layer that sits directly on the spinal cord, glossy coating, cannot be dissected away
Term
epidural
Definition
location of venous plexus and fat, outside the meninges but inside the bone
Term
subdural space
Definition
space between dura and arachnoid (not a real space, but has no CT in it)
Term
subarachnoid space
Definition
space between arachnoid and pia
Term
subarachnoid space
Definition
space that contains the CSF, continuous with brain space (encloses all CNS)
Term
internal vertebral plexus
Definition
venous plexus in the vertebrae that goes to both head and pelvic organs,drains bone, CT, muscle, dura, spinal nerves and has no valves. Clinically important as it can be the route of pelvic cancer metasteses to the brain or spine(ex: ovarian or prostate)
Term
denticulate ligament
Definition
a band of fibrous pia mater extending along the spinal cord on each side between the dorsal and ventral roots(attaches to arachnoid and dura)
Term
Dorsal root
Definition
root that carries sensory information from the environment to the CNS
Term
Ventral root
Definition
root that carries motor information from the CNS to muscles and glands, controlling their functions
Term
denticles
Definition
small toothlike process (attachment site for denticulate ligament)
Term
L1/L2 disk
Definition
where spinal cord ends
Term
the same length
Definition
in a fetus the spinal cord, meninges, and vertebral column are all _____
Term
more
Definition
in an adult, compared to the fetus, there is more/less space between lumbar vertebra?
Term
longer
Definition
in adults(compared to the fetus) the nerve roots in the lumbar and sacral area are longer/shorter/the same
Term
vertebra grow and take meninges with it
Definition
what 2 things in the adult grow longer (vertebrae, meninges, spinal cord)
Term
conus medularis
Definition
name of the tapered end of the spinal cord
Term
filum terminale internus
Definition
made of pia mater, stabilizes the spinal cord from below (stretches from conus medularis to bottom of dural sac)
Term
subarachnoid space
Definition
location of nerve roots below the spinal cord
Term
S2
Definition
lowest point of subarachnoid space (dural sac)
Term
filum terminale externus
Definition
all 3 layers of dura fused together, anchors dural sac to the coccyx
Term
dural sac
Definition
The membranous sac that encases the spinal cord within the bony structure of the vertebral column, ends at S2
Term
cauda equina
Definition
name of bundle of nerve root "tails" at end of spinal cord
Term
epineurium
Definition
covers nerve roots of cauda equina
Term
when deprived of oxygen, neural tissue starts dying quickly (5 min or less will cause irreverible damage)
Definition
why spinal cord has a redundant blood supply
Term
Vertebral artery
Definition
major blood vessel to brain,, flows up through foramen magnum, it branches off the subclavian artery. Has branches on both sides of anterior spinal column, in neck region only.
Term
Artery of Adamkiewiscz
Definition
important branch of distal spinal cord (usu. from left side at L2) identified by being the largest of the segmental arteries at the end of the spine.
Term
Artery of Adamkiewicz
Definition
Important artery in abdominal surgery. Disrupted blood flow could cause spinal cord injury leading to paraplegia or pelvic organ issues.
Term
anastomoses
Definition
communication between vessels(like a junction)
Term
anterior/posterior spinal arteries
Definition
unpaired/paired arteries that arise from the vertebral arteries, reinforced(form anastomoses) by segmental arteries of the trunk(run length of spinal cord in parallel)
Term
anterior and posterior medullary arteries
Definition
segmental arteries that reach the spinal cord and anastomose with the spinal artery
Term
radicular arteries
Definition
short, segmental arteries that reach the spinal nerve root
Term
radiculospinal arteries
Definition
segmental arteries that reach both the spinal nerve roots and the spinal cord (and medulla)
Term
spina bifida occulta
Definition
neural tube defect, presents with normal meninges, may have missing vertebral arches, tuft of hair
Term
spina bifida cystica
Definition
neural tube defect where meninges (dura and arachnoid) are herniated out
Term
meningiocele (spina bifida cystica at base of spine)
Definition
neural tube defect (at base of spine or skull) where meninges are herniated, dura, arachnoid, and sub arachnoid space herniate out, but nerve root is intact
Term
meningomyelocele
Definition
neural tube defect where dura, and arachnoid meninges herniate outward, nerve herniates too
Term
meningoencephalocele
Definition
NT defect where meninges, CSF and brain are herniated
Term
meningohydroencephalocele
Definition
NT defect where CSF, meninges, brain, and ventricles are herniated
Supporting users have an ad free experience!