Iliopsoas

Question 1

Psoas Major

Answer 1

O: bodies + transverse processes of lumbar vertebrae (possibly T12)

I: lesser trochanter of femur

A: flexion of thigh, slight adduction of thigh

In: femoral nerve

Question 2

Iliacus

Answer 2

O: iliac fossa

I: lesser trochanter of femur

A: flexion and slight adduction of thigh

In: femoral nerve

Question 3

Psoas Minor

Answer 3

O: T12 - L1

I: superior ramus of pubis

A: upward rotation of the pelvis

In: first/second lumbar nerve

Question 4

Pectineus

Answer 4

O: superior ramus of the pubis

I: femur just distal to the lesser trochanter

A: flexion and adduction of the thigh

In: femoral nerve, possibly obturator and/or accessory obturator