Spinal Meninges and Spinal Cord

Question 1

What is the outermost layer of the spinal meninges

Answer 1

Dura mater. TOUGH MOTHA!!!

Question 2

What does the dura mater fuse with laterally along spinal nn

Answer 2

the neural sheath distal to the DRG and with the margins of the intervertebral foramina

Question 3

What spinal ligament does the dura mater attach to

Answer 3

the posterior longitudinal ligament

Question 4

what terminal structure does the dura mater surround

Answer 4

filum terminale to form coccygeal ligament

Question 5

What is located in the epidural space

Answer 5

fat and blood vessels

location of internal vertebral venous plexuses

Question 6

What type of space is the subdural space and what is in it

Answer 6

potential space. filled with fluid and moistens apposed surfaces of dura and arachnoid mater

Question 7

Where is the terminal limit of both dura and arachnoid mater

Answer 7

SV2

Question 8

Where does the arachnoid mater join to become conitnuous with neural sheath at spinal n

Answer 8

DIRECTLY to dorsal and ventral roots

Question 9

What type of space is the subarachnoid space and what is in it

Answer 9

real space filled with cerebrospinal fluid continuous with cranial subarachnoid space

Question 10

What layer is the pia in regards to the spinal cord

Answer 10

closest

Question 11

What are the structures to attach pia mater to the dura between nerve roots

Answer 11

denticulate ligaments

Question 12

What acts as shock absorber in spinal cord and what anchors the cord

Answer 12

CSF-shock absorber in subarachnoid space. The pia anchor cord alterally via denticulate ligaments and then the pia mater sheathed by dura forming filium terminale anchor cord inferiorly

Question 13

How long is the spinal cord approximately

Answer 13

45 cm

Question 14

Why do our vertebral segments not align with nerves

Answer 14

because there is differential growth of the vertebral column after birth while the spinal cord is fully grown

Question 15

What do dorsal and ventral roots arise from

Answer 15

rootlets of a single spinal cord segment

Question 16

What is found in the DRG

Answer 16

primary cell bodies of sensory neurons

Question 17

How many spinal nerves form and what fuses to make them

Answer 17

31 pairs of spinal nerves

fusion of dorsal and ventral roots

Question 18

Divisions of spinal nerve pairs

Answer 18

8 cervical, 12 thoracic, 5 lumbar, 5 sacral and 1 coccygeal

Question 19

What forms the cauda equina

Answer 19

the lower lumbar and sacral rootlets leaving spinal cord(at conus medullaris)

Question 20

why are the cervical and lumbar regions of the spinal cord generally larger

Answer 20

increased number of nerve nuclei in the anterior horm

Question 21

The anterior horn of spinal cord is motor or sensory?

Answer 21

motor

Question 22

How many spinal a are on the anterior side and what does/do it/they arise from

Answer 22

1 anterior spinal a. arises from both vertebral aa and run along ventral median fissure

Question 23

What is the name of the a that assists in the continuity of the anterior spinal a

Answer 23

segmental medullary aa

Question 24

How many spinal aa are on the posterior side of the cord. origination?

Answer 24

2 posterior spinal aa arising of PICA posterior inferior cerebellar a.

Question 25

what do the radicular aa turn into when they reach the spinal cord

Answer 25

segmental medullary aa

Question 26

What segments of the cord are most vulnerable to ischemia and why

Answer 26

T1-T4 and L1 becuase these areas usually do not have radicular aa that reach all the way to the anterior and posterior aa