Iliacus

1. Iliacus

Origin

Iliac fossa of ilium, internal lip of iliac crest, lateral aspect of sacrum

Insertion

Lesser trochanter of the femur

Action

• Hip flexion

Psoas Major

2. Psoas Major

Origin

Transverse processes of L1 - L5 and bodies and discs of T12 - L5

Insertion

Lesser trochanter of the femur

Action

• Hip flexion
• Trunk flexion

Psoas Minor

3. Psoas Minor

Origin

Bodies of T12 and L1

Insertion

Pectineal line, Iliopectineal eminence and fascia over psoas major and iliacus

Action

• Hip flexion
• Trunk flexion (weak)