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Flashcards in 3. The spine Deck (10)
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1

how many vertebrae in spine

33

2

name the different types of vertebrae, how many, and how mobile

- 7 cervical: mobile
- 12 thoracic: relatively immobile
- 5 lumbar: mobile
- 5 sacral: fused
- 4 coccygeal: fused

3

describe the curvatures of the vertebral column

1. cervical - lordosis
2. thoracic - kyphosis
3. lumbar - lordosis
4. sacral - kyphosis

4

which vertebrae does the centre of gravity run through

C1/2... C7/T1... T12/L1... L5/S1

5

describe the development of spine curvatures during ageing

1. primary curvature: foetus flexed in single C-shaped kyphosis

secondary curvatures:
2. cervical lordosis develops as child begins to lift head
3. lumbar lordosis develops as child begins to crawl, stand and walk

4. senile kyphosis: loss of secondary curvatures in old age

6

what separates adjacent vertebrae

intervertebral discs

7

what % of spinal column do IV discs make up

25%

8

what are IV discs composed of

70% water, 20% collagen, 10% proteoglycans

9

name the 2 regions of IV discs

1. peripheral annulus fibrosus
2. central nucleus pulposus

10

how are the 2 IV disc regions different

annulus fibrosus
- made up of lamellae of annular bands; outer lamellae = type I collagen, inner lamellae = fibrocartilage
- acts as major shock absorber

nucleus pulposus
- gelatinous notochord remnant made of type 2 collagen
- high osmotic pressure