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Flashcards in Spinal cord & spinal nerves Deck (51)
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1

What does the spinal cord do?

- conducts or transmits sensory impulses from the body to the brain
- conducts motor impulses from the brain to the body
- controls reflex action

2

What is the epidural space?

fairly large space filled with adipose tissue that acts as a buffer around the spinal cord

3

What are meninges?

membranes that surround the brain and spinal cord

4

What protects the spinal cord?

spinal vertebrae, meninges, and epidural space

5

What are the 3 types of meninges?

1. Dura mater- subdural SPACE filled with INTERSTITIAL fluid that anchors and protects
2. Archnoid mater- subarchnoid SPACE filled with CSF
3. Pia mater- thin MEMBRANE that follows the contour of the brain and spinal cord

6

Whats the Dura Mater?

subdural SPACE filled with INTERSTITIAL fluid that anchors and protects

7

What is the Archnoid mater?

subarchnoid SPACE filled with CSF

8

What is the Pia mater?

thin MEMBRANE that follows the contour of the brain and spinal cord

9

Pia mater is the most _______ of the meninges.

central or deep

10

The arachnoid mater is ______ to the pia mater.

superficial

11

THe dura mater is the most _______ meninges on the spinal cord.

superficial

12

How long is the typical spinal cord?

42-45 cm long

13

What is the foreman magnum?

the hole where the spinal cord attaches to the brain

14

Which vertebrae does the spinal cord reach to as an infant and as an adult?

infant- L4
adult - L1

15

When does the growth of the spinal cord stop?

age 5

16

What makes the cervical enlargement and the lumber enlargement, enlarged?

there is an increase of nerve tissue

17

Define conus medullaris

cone shaped end of spinal cord

18

Define cauda equina

the dorsal ventral roots of lowest spinal nerves

19

Define filum terminale

thread-like extension of the pia mater that stabalizes spinal cord in spinal canal

20

What is a sulcus?

shallow groove

21

Is the sulcus of the spinal cord on the ventral or dorsal side?

sulcus is on the dorsal side

22

Is the Fissure of the spinal cord on the ventral of dorsal side?

fissure is on the ventral side

23

What are the 2 spinal nerve roots that emerge from the spinal cord?

- dorsal root (sensory)
- ventral root (motor)

24

What kind of fibres does the dorsal root have?

sensory fibres in the dorsal root

25

What kind of fibres does the ventral root have?

motor fibres in the ventral root

26

What is the dorsal root ganglion?

contains cell bodies of sensory neurons

27

What neuroglial cells protect by wrapping themselves around the dorsal root ganglion?

satellite cells

28

What is the motor tract?

- descending tract
- has pyramidal (direct) and
- has extrapyramidal tracts (indirect)

29

What are sensory tracts

- ascending tracts
- dorsal columns
- spinothalamic
- spinocerebellar

30

What are the 3 sensory tracts?

- dorsal columns
- spinothalamic
- spinocerebellar