Muscles Of The Knee Complex

Question 1

Rectus femoris (of quadriceps femoris group)

Answer 1

Origin- anterior inferior iliac spine

Insertion- tibial tuberosity via the patella and the patella ligament

Functions-
Extends the leg at the knee joint
Flexes the thigh at the hip joint

Question 2

Vastus lateralis ( of quadriceps femoris group)

Answer 2

Origin- the lateral lip of the linea aspera of the femur

Insertion- tibial tuberosity via the patella and the patella ligament

Functions-
Extends the leg at the knee joint

Question 3

Vastus medialis (of quadriceps femoris group)

Answer 3

Origin- the medial lip of the linea aspera of the femur

Insertion- tibial tuberosity via the patella and the patellar ligament

Functions-
Extends the leg at the knee joint

Question 4

Vastus intermedius (of quadriceps femoris group)

Answer 4

Origin- anterior shaft and lateral lip of the linea aspera of the femur

Insertion- tibial tuberosity via the patella and patellar ligament

Functions-
Extends the leg at the knee joint

Question 5

Biceps femoris (of the hamstring group)

Answer 5

Origin-
Long head- ischial tuberosity
Short head- linea aspera and the lateral supracondylar line of the femur

Insertion-
Head of the fibula and the lateral tibial condyle

Functions-
Flexes the leg at the knee joint
Extends the thigh at the hip joint

Question 6

Semitendinous (of hamstring group)

Answer 6

Origin- ischial tuberosity

Insertion- pes anserine tendon at the proximal anteromedial tibia

Functions-
Flexes the leg at the knee joint
Extends the thigh at the hip joint

Question 7

Semimembranosus (of hamstring group)

Answer 7

Origin- ischial tuberosity

Insertion- posterior surface of the medial condyle of the tibia

Functions-
Flexes the leg at the knee joint
Extends the thigh at the hip joint

Question 8

Popliteus

Answer 8

Origin- the lateral surface of the lateral condyle of the femur

Insertion- proximal posteomedial tibia

Functions-
Medial rotates and flexes the leg at the knee joint