Muscles Flashcards
1
Q
External oblique
A
O: last 8 ribs
I: linea alba (pubic bone, iliac crest)
A: compress abdomen, ipsilateral trunk sidebending, contralateral rotation
“Hands in pockets”
2
Q
Internal oblique
A
O: lumbar fascia, iliac crest, inguinal ligament
I: linea alba (ribs)
A: compress abdomen, ipsilateral trunk sidebending, ipsilateral trunk rotation
“Hands on chest”
3
Q
Transversus abdominus
A
O: Lumbar fascia, iliac crest, inguinal ligament
I: linea alba (iliac crest)
A: Compresses abdomen
Muscle fibers are horizontal
4
Q
Rectus abdominus
A
O: pubic bone I: xiphoid process, costal cartilage A: trunk flexion, forced exhalation, increases abdominal pressure (Valsalva) Split in two by linea alba Sectioned by tendinous intersections
