Lower Extremity Muscles

Question 1

Psoas Major

Answer 1

ORIGIN: transverse bodies of all lumbar vertebra

INSERTION:lesser trochanter of the femur (with iliacus)

ACTION: hip flexion (or trunk flexion if femur is stationary)

INNERVATION: lumbar plexus

Question 2

Iliacus

Answer 2

ORIGIN: iliac fossa of ilium

INSERTION: lesser trochanter of femur

ACTION: hip flexion

INNERVATION: femoral nerve