Muscles of Posterior Abdominal Wall Flashcards
Quadratus Lumborum (origin)
Medial half of inferior border of 12th rib, tips of lumbar transverse processes
Quadratus Lumborum (insertion)
iliolumbar ligament, internal lip of iliac crest
Quadratus Lumborum (action)
Extends and laterally flexes vertebral column, fixes 12th rib during inspiration
Quadratus Lumborum (innervation)
Ventral rami of T12-L4
Psoas Minor (origin)
T12-L1
Psoas Minor (insertion)
superior ramus of pubis
Psoas Minor (action)
posterior pelvic tilt
Psoas Minor (innervation)
lumbar nerves 1 and/or 2
Psoas Major (origin)
Bodies and transverse processes of all lumbar vertebrae
Psoas Major (insertion)
Lesser trochanter of femur
Psoas Major (action)
flex and laterally rotate hip, anterior pelvic tilt
Psoas Major (innervation)
Lumbar nerves 2-4