muscles of vertebral column, abdomen and pelvis Flashcards
muscles in the thoracic region
external and internal intercostals
external intercostal function
elevates ribs
external intercostal origin and insertion
O: inferior border of each
I: superior border of more inferior rib
internal intercostal function
depress ribs
internal intercostal origin and insertion
O: superior border of each rib
I: inferior border of the preceding rib
abdominal region muscles
external and internal obliques
external oblique function
compresses abdomen
external oblique origin and insertion
O: external borders of ribs 5-12
I: iliac crest
internal oblique function
compresses abdomen
internal oblique origin and insertion
O: iliac crest
I: inferior ribs
diaphragm function
expands thoracic cavity
diaphragm origin and insertion
o: xiphoid process
I: central tendinous sheet
rectus abdominis function
depresses ribs
rectus abdominis origin and insertion
O: superior surface of the pubis
I: inferior surfaces of costal cartilages (ribs 5-7)
