Muscles of Posterior Abdominal Wall Flashcards
1
Q
Psoas Major Origin-3
A
- Transverse processes of lumbar vertebrae
- Side of bodies of T12-S1 vertebrae
- IV discs of T12-S1
2
Q
Psoas Major Insertion
A
Strong tendon to lesser trochanter of femur
3
Q
Psoas Major Innervation
A
Lumbar plexus via anterior branches of nerves L2-L4
4
Q
Psoas Major Action-3
A
Acting inferiorly w/ iliacus-Flexes thigh
Acting superiorly-Laterally flexes vertebral column
When sitting-acts inferiorly w/ iliacus to flex trunk
5
Q
Iliacus Origin-3
A
- Superior 2/3 of iliac fossa
- Ala of sacrum
- Anterior sacro-iliac ligaments
6
Q
Iliacus Insertion-3
A
- Lesser trochanter of femur
- Shaft of femur
- Psoas major tendon
7
Q
Iliacus Innervation
A
Femoral Nerve (L2-L4)
8
Q
Iliacus Action-2
A
- Flexes thigh and stabilizes hip joint
- Acts with psoas major
9
Q
Quadratus Lumborum Origin-2
A
- Medial half of inferior border of 12th rib
- Tips of lumbar transverse processes
10
Q
Quadratus Lumborum Insertion-2
A
- Iliolumbar ligament
- Internal lip of iliac crest
11
Q
Quadratus Lumborum Innervation
A
Anterior branches of T12 and L1-L4 nerves
12
Q
Quadratus Lumborum Action
A
- Extends and laterally flexes vertebral column
- Fixes 12th rib during inspiration
