Rib DSA Flashcards
What does the rib head articulate with?
superior costal facet (own vertebra) and inferior costal facet (vertebra above)
What is the rib neck?
area between the head and the tubercle
Define tubercle
articulates with the transverse process of corresponding vertebra
Define rib angle
abrupt change in rib curvature
Which ribs only articulate with their own vertebrae?
1, 10, 11, 12
Which ribs do not have tubercles and therefore do not articulate with transverse processes?
11, 12
What ribs are considered atypical?
1, 2, 11, 12 (sometimes 10)
What ribs are called typical?
3-9 (sometimes 10)
Which ribs are true ribs?
1-7
cartilage attaches to sternum
Which ribs are false ribs?
8-12
8-10 cartilages attaches to costal cartilage of the rib above
Which ribs are floating ribs?
11-12
no anterior attachment
Insertion and action of anterior scalene
superior surface of 1st rib
side bends and rotates neck (unilateral), flexes neck (bilateral)
Insertion and action of middle scalene
superior surface of 1st rib
lateral flexion of neck
Insertion and action of posterior scalene
2nd rib
elevates 2nd rib, lateral flexion of neck
Origin and action of pectoralis minor
anterior superior surface of ribs 3,4,5,
stabilizes scapula