Muscles that act on the leg OIAs

Question 1

Biceps Femoris (short head)

Answer 1

Origin: Linea Aspera of femur
Insertion: head of fibula and lateral condyle of tibia
Action: flexes leg/knee

Question 2

Vastus lateralis

Answer 2

Origin: Greater trochanter and linea aspera of femur
Insertion: tibial tuberosity via the patella
Action: extends leg/knee

Question 3

Vastus medialis

Answer 3

Origin: Linea aspera of femur
Insertion: tibial tuberosity via the patella
Action: extends leg/knee

Question 4

Vastus Intermedius

Answer 4

Origin: Anterior surface of femur
Insertion: tibial tuberosity via the patella
Action: extends leg/knee

Question 5

popliteus

Answer 5

Origin: Lateral condyle of femur
Insertion: proximal portion of tibia
Action: flexes and rotates leg/knee