Anterior Hip

Question 1

Psoas Major

Answer 1

Origin: T12-L5 vertebral bodies + transverse processes

Insertion: lesser trochanter of femur

Action: Hip flexion, hip joint stabilisation

Innervation: L1-3 ventral rami

Question 2

Iliacus

Answer 2

Origin: Iliac fossa

Insertion: Lesser trochanter of femur and anterior capsule of hip joint

Action: Hip flexion

Innervation: Femoral nerve (L2, L3)

Question 3

Obturator Externus

Answer 3

Origin: external surface of obturator foramen and membrane

Insertion: trochanteric fossa of femur

Action: Hip lateral rotation

Innervation: Obturator nerve (L3, L4)