RECTUS FEMORIS

• Origin

Anterior inferior iliac spine, upper margin of acetabulum

• Insertion

Tibial tuberosity via patellar tendon

• Agonist(s)

- Gluteus maximus

- Vastus lateralis

- Vastus medialis

- Vastus intermedius

• Antagonist(s):

(Hamstrings)

- Biceps femoris

- Semitendinosus

- Semimembranosus

• Function

Knee extension, hip flexion