Posterior Abdominal Wall Muslces

Question 1

Psoas major

Answer 1

O: transverse processes, bodies and intervertebral discs of t12-L5
I: lesser trochanter with iliacus
N: ventral primary rami of L2-L4
A: flexion of the thigh, lateral flexion of the trunk and flexion of the trunk

Question 2

Psoas minor

Answer 2

O: bodies of the vertebrate t12 and l1 and the disc in between
I: pubic bone
N: ventral primary Ramos L1
A: flexion of the pelvis and ventral column

Question 3

Iliacus

Answer 3

O: iliac fossa
I: lesser trochanter with psoas major
N: femoral nerve
A: flexion of the thigh

Question 4

Quadratus lumborum

Answer 4

O: iliac crest, iliolumbar ligament , and transverse
Processes of the lower lumbar vertebrate
I: rib 12, transverse process of upper lumbar vertebrate
N: subcostal and upper lumbar ventral primary rami
A: flexion of the trunk laterally, extend the vertebral column, elevate the hip, stabilize the 12th rib against inspiration