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Flashcards in Spinal Cord Deck (25)
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1

How is a bundle of neurones termed differently in the CNS vs PNS

Tract, nerve

2

How is a body of axons termed differently in CNS v PNS

Nucleus, Ganglion

3

A branch of an axon is a

collateral

4

Briefly outline neural tube formation

1. Neural plate epithelium
2. Epithelium is folded to form a groove
3. Neural crest + Neural tube cells

5

What occurs when neural tube doesn't close?

Anencephaly and spinal bifida

6

Which vitamin helps with neural tube formation?

Folic acid

7

What are the different meninges?

1. Dura
2. Arachnoid
3. Pia

8

What does the subarachnoid space contain?

CSF - allows CNS to float

9

What connects pia and arachnoid layers?

Denticulate ligament

10

What are the segments of the spinal cord named after?

The spinal nerve to which they give rise

11

Name segments and lengths of spinal cord from top to bottom

1. Cervical 1-8
2. Thoracic 1-12
3. Lumbar 1-5
4. Sacral 1-6
5. Coccygeal

12

At which segment and number does the spinal cord end and how does this differ from at birth

L1 and L3 at birth

13

Cervical enlargement extends from

C5 - T1

14

Cervical enlargement is due to

large nerves which supply upper limbs

15

Lumbar enlargement extends from

L1-S2

16

What extends beyond the end of the spinal cord?

Nerve roots

17

Tapered lower end of spinal cord

Conus medullaris

18

After the spinal cord tapers out, the spinal nerves branch out diagonally forming the

Cauda equina

19

Cauda equina consists of

L2-L5 nerve pairs

20

The rostral end of the neural tube expands to form

the brain

21

2 outgrowths of of forebrain vesicles

1. Telencephalon
2. Diencephalon

22

Choroid plexus

Plexus of cells that produce CSF - largely in lateral ventricles

23

Brainstem function

Midbrain: vision, brain, hearing, eye + body movement
Medulla: passive body needs
Pons: motor control + sensory analysis

24

Diencephalon includes

Hypothalamus + thalamus

25

Cerebral aqueduct connect

3rd + 4th ventricle