Muscles of Posterior Abdominal Wall Flashcards Preview

Gross Anatomy > Muscles of Posterior Abdominal Wall > Flashcards

Flashcards in Muscles of Posterior Abdominal Wall Deck (12):
1

Psoas Major Origin-3

-Transverse processes of lumbar vertebrae
-Side of bodies of T12-S1 vertebrae
-IV discs of T12-S1

2

Psoas Major Insertion

Strong tendon to lesser trochanter of femur

3

Psoas Major Innervation

Lumbar plexus via anterior branches of nerves L2-L4

4

Psoas Major Action-3

Acting inferiorly w/ iliacus-Flexes thigh
Acting superiorly-Laterally flexes vertebral column
When sitting-acts inferiorly w/ iliacus to flex trunk

5

Iliacus Origin-3

-Superior 2/3 of iliac fossa
-Ala of sacrum
-Anterior sacro-iliac ligaments

6

Iliacus Insertion-3

-Lesser trochanter of femur
-Shaft of femur
-Psoas major tendon

7

Iliacus Innervation

Femoral Nerve (L2-L4)

8

Iliacus Action-2

-Flexes thigh and stabilizes hip joint
-Acts with psoas major

9

Quadratus Lumborum Origin-2

-Medial half of inferior border of 12th rib
-Tips of lumbar transverse processes

10

Quadratus Lumborum Insertion-2

-Iliolumbar ligament
-Internal lip of iliac crest

11

Quadratus Lumborum Innervation

Anterior branches of T12 and L1-L4 nerves

12

Quadratus Lumborum Action

-Extends and laterally flexes vertebral column
-Fixes 12th rib during inspiration