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Flashcards in Meninges Deck (20)
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1

What surrounds,suspend and protects the spinal cord?

three layers of meninges
contain the CSF

2

What are the three layers of meninges from outer to innermost?

Dura mater
Arachnoid mater
Pia mater

3

What is dura mater?

outer most layer of the meninges. it is the toughest thickest and denser layer.

4

What is dura mater attached to superiorly and anteriorly?

Foramen magnum superiorly
vert bodies anteriorly

5

What does the dura mater do to spinal nerves?

ensheathes them as they exit the dural sac and anchor them to the intervertebral foramen. it is now called the epineurium

6

What does the dura mater attaches to inferiorly?

it tapers at S2 forming he spinal coccygeal ligament
it attaches to the posterior surface of the coccyx

7

What are the meningeal nerves?

sympathetic and afferent fibers
this is where pain of the spinal cord and pain from the spinal cord is felt

8

What is the Arachnoid mater?

delicate web like in appearance
it lines the entire rural sac to S2 level

9

What are the Arachnoid trabeculae?

Arachnoid fibers that extend across the sub arachnid space to the pia mater

10

What is the pia mater?

most delicate layer of meninges
lines the surface of spinal cord and blood vessels

11

What does the pia mater cover inferiorly?

conus medlars then forms the film terminale

12

What is denticulate ligaments?

reinforced pia mater that form a tooth like lateral projections that are anchored on the arachnoid mater

13

What is the purpose of the denticulate ligaments?

stabilizing and suspending the spinal cord within the dural sac

14

What are the dural spaces?

Epidural space
subdural space
subarachnoid space

15

Where is the epidural space located?

outside the dura mater in the vertebral canal

16

What does the epidural space contain?

adipose tissue to cushion the spinal cord and plexus of veins

17

What is the subdural space?

potential space between the dura mater and arachnoid mater. not an actual space only. arachnoid mater lis directly on the dura mater. only space when hemorrhages occur

18

What is the subarachnoid space?

space between the arachnoid mater and pia mater

19

What does the sub arachnoid space contain?

CSF

20

What is the lumbar cistern?

it is what surrounds the Cauda equina.
it is a continuation of the subarachnoid space
most common place for a spinal tap