The quadriceps femoris is located in the anterior part of the thight and is a hip flexor and knee extensor. The muscle consist of 4 individual muscle.

1. Rectus femoris

2. Vastus lateralis

3. Vastus medialis

4. Vastus intermedius

These muscles form the main thigh and collectively they are one of the most powerful muscles in the human body. The main function of this muscle is to help with knee extension and straightening of leg