Thoracic Muscles Flashcards
1
Q
Diaphragm
A
Origin: Inferior internal surface or rib cage and sternum, costal cartilages of last 6 ribs, lumbar vertebrae
Insertion: Central tendon
Action: Prime mover of inspiration -breathing
2
Q
Internal Intercostal
A
Location: 11 pairs between ribs, run downward and posteriorly
Action: Draw ribs together and depress rib cage -breathing
3
Q
External Intercostal
A
Location: 11 pairs between ribs, run downward and forward
Action: pull ribs toward each other to elevate rib cage -breathing
4
Q
Transverse Thoracis
A
Location: Interior to the thoracic cage anteriorly
Action: supports expiration -breathing
