NEURO: SPINAL CORD Flashcards Preview

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Flashcards in NEURO: SPINAL CORD Deck (108)
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1

how many cervical vertebrae are there?

7

2

what is C1 called?

atlas

3

what is C2 called?

axis

4

how many thoracic vertebrae are there?

12

5

how many lumbar vertebrae are there?

5

6

how many sacral vertebrae are there?

5 (fused)

7

how many coccyx vertebrae are there?

4 (fused)

8

how many vertebrae are there in the spine in total?

33

9

how many spinal nerves are there?

31

10

how is skeletal muscle attached to bone?

by tendon

11

what is a skeletal muscle comprised of?

several muscle fasciculi

12

what is a muscle fasciculi comprised of?

several muscle fibres

13

what are muscle fibres comprised of?

comprised of myofibrils - actin and myosin

14

what happens when muscles are depolarised?

actin and myosin slide over each other to produce muscle contraction

15

what is the structure of cervical vertebrae?

- have a transverse foramen - contains vertebral artery and sympathetic chain
- has bifid spinous processes (except C7)
- C2 has prominent spike called dens
-

16

what is the structure of the thoracic vertebrae?

- spinous processes are much thinner and more descending
- have circular vertebral foramen
- have costal facets

17

what is the structure of lumbar vertebrae?

- spinous processes are thick and broad
- have a triangular vertebral foramen

18

what are the coverings of the spinal cord?

-dura mater
- subarachnoid mater
- pia mater

19

what does the central canal of the spine contain?

CSF

20

what is the role of the spinal cord?

provides autonomic innervation of most viscera

21

where are the 2 enlargements of the spinal cord located?

cervical (C3 - T1)
lumbar (L1 - S3)

22

what does the cervical enlargement of the spinal cord supply?

the upper limbs

23

what does the lumbar enlargement of the spinal cord supply?

the lower limbs

24

what is the conus medullaris?

it is the tapering of the spinal cord

25

what is the filum terminale?

the end of the spinal cord - found at the end of the conus medullaris

26

where does the spinal cord end at 3 months of foetal life?

extends the whole length

27

where does the spinal cord end at birth?

L3

28

where does the spinal cord end in adulthood?

L1 - L2

29

what do axons in the dorsal cord of the spine convey?

afferent neurons - sensory

30

what do axons in the ventral cord of the spine convey?

efferent neurons - motor