Posterior abdominal wall muscles

Question 0

Insertion of Psoas Major

Answer 0

By a strong tendon to less trochanter of femur

Question 1

Psoas Major Origin

Answer 1

Transverse process of lumbar vertebrae

side of bodies of t12-s1 and intervening IV disc

Question 2

Innervation of Psoas Major

Answer 2

Lumbar plexus via anterior branch of nerve L2-L4

Question 3

Action of Psoas Major

Answer 3

Acting inferiorly with illacus flexes thigh
acting superiorly, flexes vertebral column laterally to balance the trunk
when sitting, acts inferiorly with illacus to flex trunk

Question 4

illiacus origin

Answer 4

superior two thirds of illiac fossa
ala of sacrum
anterior sacro-illiac ligament

Question 5

insertion of Illiacus

Answer 5

Lesser trochanter of femur

shaft inferior to it and to psoas major tendon

Question 6

Innervation of Illiacus

Answer 6

Femoral nerve (L2-L4)

Question 7

Action of Illiacus

Answer 7

flexes thigh
stabilizes hip joint
acts with psoas major

Question 8

Quadratus Lumborum origin

Answer 8

Medial half of inferior border of 12th rib and tips lumbar transverse processes

Question 9

Insertion of quadratus lumborum

Answer 9

Iliolumbar ligament and internal lip of illiac crest

Question 10

Innervation of quadratus lumborum

Answer 10

anterior branch of T12 and L1-L4 nerve

Question 11

Action of Quadratus Lumborum

Answer 11

Extends and laterally flexes vertebral column

fixes 12th rib during inspiration