Spinal Cord/ Meninges

Question 1

Where are the 2 spinal cord enlargements?

Answer 1

cervical/ lumbar

Question 2

What is the structure where nerve fibers from different spinal nerves are recombined/ interconnected network?

Answer 2

plexus (brachial/ lumbosacral)

Question 3

What is the point where the spinal cord ends called/ tip end of spinal cord?

Answer 3

Medullary cone

Question 4

What is the position of the medullary cone?

Answer 4

L2

Question 5

Where does the dural sac extend into?

Answer 5

proximal sacrum

Question 6

What is the spinal cord protected by?

Answer 6

surrounded by meninges

Question 7

What anchor the spinal cord/ extends distally from the medullary cone to the coccyx?

Answer 7

Terminal filament

Question 8

What is the inferior nerve roots bundle called?

Answer 8

Cauda equina

Question 9

What does the cauda equina look like?

Answer 9

horses tail

Question 10

What level is the dural sac at?

Answer 10

S2

Question 11

What is the tube of dura mater that surrounds the spinal cord/ cauda equina?

Answer 11

Dural sac

Question 12

What is the big difference between vertebral foramen/ intervertebral foramina?

Answer 12

houses spinal cord/ spinal nerves

Question 13

Why is spinal nerve important?

Answer 13

segmental distribution of motor/ sensory info

Question 14

What are the 4 parts in the formation of a spinal nerve?

Answer 14

rootlets/ roots/ spinal nerve/ rami

Question 15

What combine to form roots?

Answer 15

rootlets

Question 16

What combine to form the spinal nerve?

Answer 16

anterior/ posterior roots

Question 17

What divides into rami?

Answer 17

spinal nerve

Question 18

What contain afferent/ sensory fibers (inwards/ to cord)?

Answer 18

posterior rootlets/ roots
sensory in = poSterior

Question 19

What contain efferent/ motor fibers? (exit outwards/ away)

Answer 19

anterior rootlets/ roots
motor out = anterior

Question 20

What fibers carry only motor information?

Answer 20

anterior rootlets/ roots

Question 21

What fibers carry only sensory information?

Answer 21

poSterior rootlets/ roots

Question 22

What fibers carry both sensory/ motor info?

Answer 22

spinal nerve/ rami (each ramus)

Question 23

What fibers carry sensory info?

Answer 23

spinal nerve/ each ramus/ poSterior rootlets/ poSterior roots

Question 24

What fibers carry motor info?

Answer 24

spinal nerve/ each ramus/ anterior rootlets/ anterior roots

Question 25

What muscles do posterior rami innervate?

Answer 25

deep back muscles

Question 26

What muscles do anterior rami innervate?

Answer 26

upper limb/ intercostal

Question 27

What injury to spinal cord is more severe: proximal (superior) / distal (inferior) ?

Answer 27

higher = more severe proximal- paralized vs distal- cane

Question 28

What are the layers of meninges superficial to deep?

Answer 28

dura mater/ arachnoid mater/ pia mater

Question 29

In real life where is the arachnoid mater?

Answer 29

pressed up against dura mater

Question 30

What are the 2 lateral extensions of pia called? (1 on each side)

Answer 30

denticulate ligament

Question 31

Where is CSF?

Answer 31

subarachnoid space

Question 32

Where is the subarachnoid space?

Answer 32

between pia/ arachnoid mater

Question 33

What is the space outside the dura mater/ between the vertebral canal called?

Answer 33

epidural space

Question 34

What reflects the absence of laminae/ spinous processes of S4/S5 vertebrae?

Answer 34

sacral hiatus

Question 35

What represents inferior articular process of S5 vertebrae/

Answer 35

sacral cornua