1. Lower Leg Muscles
Tiana Perry

2. Vastus Medialis (Quadriceps)
Action: extends knee, stabilizes patella
Origin: at the top of the femur
Insertion: at the bottom of the femur, over patella

3. Vastus Intermedius (Quadriceps)
Action: Extends knee
Origin: at the top of the femur bone
Insertion: at the bottom of the femur bone, past the patella

4. Vastus Lateralis (Quadriceps)
Action: extends knee
Origin: at the top of the femur bone
Insertion: at the bottom of the femur bone, past the patella

5. Rectus Femoris (Quadriceps)
Action: extends leg at knee, flexes thigh at hip
Origin: attached to the illium
Insertion: at the bottom of the femur bone, past the patella

6. Sartorius Action: flexes thigh on hip Origin: ilium
Insertion: at the top of the tibia bone

7. Semitendinosus (Hamstrings)
Action: flexes and medially rotates knee, extends hip
Origin: ischial tuberosity
Insertion: posterior side of tibia

8. Semimembranosus (Hamstrings)
Action: flexes and medially rotates knee, extends hip
Origin: ischial tuberosity
Insertion: posterior side of tibia

9. Biceps Femoris (Hamstrings)
Action: flexes and laterally rotates knee, long head extends hip
Origin: ischial tuberosity
Insertion: head of fibula and lateral condyle of tibia