Intrinsic muscles of the thorax Flashcards
1
Q
Action of external intercostals?
A
elevates inferior rib
2
Q
Action of internal intercostals?
A
Depresses superior rib
3
Q
Levator costarum origin, insertion and action?
A
O - C7 & thoracic transverse processes
I - rib below
action - elevate rib
4
Q
Action of diaphragm?
A
Main muscle of inspiration
5
Q
Innervation of intercostal and serratus muscles?
A
Intercostal nerves = ventral rami thoracic spinal nerves
6
Q
Innervation of levator costarum?
A
Dorsal rami spinal nerves
7
Q
Innervation of diaphragm?
A
Phrenic nerve
