Muscles of the posterior abdominal wall

Question 1

psoas major

Answer 1

TVP of L1-L5 vertebrae
vertebral bodies of T12-L5
adjacent interverteberal discs

to

lesser trochanter of femur

Function:
flexes thigh at hip joint
flexes trunk

Question 2

psoas minor
(absent in 40% of cases)

Answer 2

vertebral bodies of T12, L1
adjacent vertebral discs

to

iliopectineal eminence and pecten pubis of hip bone

Function: assists in flexion of trunk

Question 3

iliacus

Answer 3

iliac crest, iliac fossa, iliolumbar ligament

to

lesser trochanter of femur via tendon of psoas major

Question 4

quadratus lumborum