4. Insertion
Origin
Muscle
linea alba, pubic crest &
tubercle, anterior superior
iliac spine & anterior half of
iliac crest
lower 8 ribs
external abdominal
oblique
lower 3 or 4 ribs, linea alba,
pubic crest and pecten
lumbar fascia, anterior 2/3 of the iliac
crest, lateral 2/3 of the inguinal
ligament
internal abdominal
oblique
linea alba, pubic crest and
pecten
lower 6 ribs, thoracolumbar fascia,
anterior 3/4 of the iliac crest, lateral
1/3 of inguinal ligament
transversus
abdominis
xiphoid process of the
sternum and costal
cartilages 5-7
pubic crest and symphysis
rectus abdominis
14. Structure of posterior abdominal
wall
◦ 5 lumbar vertebrae
◦ 12 rib
◦ Upper part of bony pelvis
◦ Psoas muscle
◦ Quadratus lumborum muscle
◦ Origin of transversus abdominis muscle
◦ iliacus
15. Insertion
Origin
Muscle
lesser trochanter of the femur
bodies and transverse
processes of lumbar vertebrae
+ T12
psoas
transverse processes of lumbar
vertebrae 1-4 and the 12th rib
posterior part of the iliac crest
and the iliolumbar ligament
quadratus lumborum
lesser trochanter of the femur
iliac fossa and iliac crest
iliacus
