Thorax: Muscles Flashcards
1
Q
external intercostal muscles
A
origin: ribs
insertion: ribs
action: respiration/ support for intercostal space
2
Q
internal intercostal muscles
A
origin: ribs
insertion: ribs
action: respiration/ support for intercostal space
3
Q
inner most intercostal muscles
A
origin: ribs
insertion: ribs
action: respiration/ support for intercostal space
4
Q
transverse thoracis
A
O: internal aspect of sternum and costal cartilages
I: ribs and costal cartilages
Action: aid with respiration, provide support for the intercostal space
5
Q
diphragm
A
O: sternum, ribs, lumbar vertebral bodies
I: central tendon
Nerve: Phrenic
Action: depression of the diaphragm during contraction, increase the vertical dimensions of the thorax
