Spinal cord Make up

Question 1

what makes up the outer layer of CNS and how far does it cover

Answer 1

Dural sac

from foramen magnum to 2nd sacral vert

Question 2

what aa supplies the dural sac

Answer 2

vertebral art
post intercosstal aa
lumbar aa
lateral sacral aa

Question 3

What in the inn of dural sac

Answer 3

Sinuvert nerves

Question 4

Where is the extradural space

Answer 4

Inbetween the inner walls of vert cannal and outer surface of dural sacw

Question 5

Where is arachnoid mater found and is it vascularized

Answer 5

intimatly covers the inner suraface of dural sac

avascular

Question 6

what is the subdural space

Answer 6

virtual space bw dura mater and aractnoid mater

Question 7

Where is the pia mater found and function

Answer 7

Intimatly covers the spinal cord

-has dentate ligaments that anchor the spinal cord to dura mater

Question 8

Where is the subarachnoid space and what is found in it

Answer 8

space bw arachnoid and pia mater

• dorsal + ventral roots of spinal nerves
• dentate ligs
• CSF

Question 9

where does the spinal cord end in adults and newborns

Answer 9

adults- IVD l1-2

new- IVD l2/3

Question 10

what is the conus medularris

Answer 10

terminal end of spinal cord

Question 11

vert vs level is covers in spinal cord (upper cerv, lower cerv, upper thor, lower thor, 10 thor, 11 thor, 12 thor, 1st lumb)

Answer 11

upper cerv- same
lower cerve - add 1
upper thor- add 2
lower thor- add 3
10- l1/2
11-l3/4
12-l5
lumb- sacral

Question 12

where are lateral horns of gray matter found

Answer 12

only seen in thoracic region