L22: Thoracic Wall II Flashcards
1
Q
what are the three intercostal muscles
A
external intercostal muscle
internal intercostal muscle
innermost intercostal muscle
2
Q
job of external intercostal muscle
A
elevates ribs
3
Q
job of internal and innermost intercostal muscle
A
depress ribs (middle and posterior)
elevate ribs (anterior-most)
4
Q
what allows for complex elevation of the ribs and sternum
A
costovertebral joints
flexible costal cartilages
5
Q
bucket handle motion
A
elevation of the lateral midpoint increases the lateral width of the thoracic cavity
6
Q
A
