Topic 10: Skeletal System - Axial Skeleton (Vertebrae Contd) Flashcards
1
Q
C1 and C2 are ____, while C3-C7 are ____
A
- atypical
- typical
2
Q
C1 is known as the ___
A
atlas
3
Q
Why is C1 (atlas) atypical? (2)
A
- no body
- no spinous process
4
Q
What does the atlas articulate with, and what does it allow for?
A
- occipital condyle of the skull
- allows nodding yes motion
5
Q
C2 is know as the ____
A
- axis
6
Q
Why is C2 (axis) atypical? (3)
A
- it has a dens (odontoid process)
- which is a pivot joint around which atlas swivels
- which allows for shaking no motion
7
Q
What do all cervical C1-C7 vertebrae have?
A
- transverse foramina
8
Q
All thoracic vertebrae articulate with ___ via ____ facets
A
- ribs
-costal
9
Q
What is the function of the lumbar vertebrae?
A
- supports body weight
10
Q
What is the structure of lumbar vertebrae?
A
- all have large bodies and rectangular spinous processes (to hold body weight)
11
Q
What is the sacrum?
A
- 5 FUSED vertebrae (for more support)
12
Q
What does the sacrum articulate with?
A
- articulates with ilium (appendicular skeleton) and 5th lumbar vertebra (L5)
13
Q
What is the coccyx? (2)
A
- 3-5 FUSED vertebrae, usually 4
- tailbone
14
Q
What is the curvature of the cervical and lumbar vertebrae?
A
- curved convex anteriorly
- curved concave posteriorly
15
Q
What is the curvature of the thoracic and sacrum vertebrae?
A
- concave anteriorly
- convex posteriorly
