Muscles of Respiration Flashcards
name the Muscles of Respiration
Diaphragm, intercostals (External /Internal and Innermost)
Diaphragm origin
L & R crura
med & lat arcuate ligs
inner surfaces of lower 6 ribs
costal cartilages
xiphoid process
Diaphragm insertion
central tendon
Diaphragm nerve supply
R & L phrenic nerve C3, 4, 5
Diaphragm action
inspiration:
lower ribs lifted up & out
upper ribs push sternum forward
assissts venous & lymphatic drainage
external intercostals origins
lower border of above rib
External intercostals insertions
upper border of rib below
internal intercostals origins
costal groove of above rib
internal intercostals insertion
upper border of rib below
innermost intercostals origin/insertion
between innermost surfaces of adjacent ribs
intercostal nerve supply
ant primary rami of adjacent intercostal nerves
intercostal actions
elevation of rib below to rib above
inspiration
produces rigid cavity for the diaphragm to act on
