Knee Extensors

Question 1

Name the knee extensors

Answer 1

Quadriceps Femoris, Tensor Fascia Lata

Question 2

Name the muscles that make up the quadriceps femoris

Answer 2

Rectus Femoris, Vastus Lateralis, Vastus Medialis, Vastus Intermedius

Question 3

Rectus femoris origin.

Answer 3

Straight head- Anterior inferior iliac spine
Reflected head- roughened area above the acetabulum.

Question 4

Rectus femoris insertion.

Answer 4

Patella upper border and via ligamentum patellae to the tibial tuberosity.

Question 5

Rectus femoris nerve supply

Answer 5

Femoral nerve, L2, 3, 4.

Question 6

Rectus femoris actions

Answer 6

Hip flexion knee extension.

Question 7

Rectus femoris function

Answer 7

standing up

Question 8

Vastus lateralis origin.

Answer 8

Upper lateral part of intertrochanteric line, lower border of greater trochanter, lateral side of glue teal tuberosity, upper half of lateral lip of linear aspera.

Question 9

Vastus lateralis insertion.

Answer 9

Base & lateral border of the patella, blends with rectus femoris.

Question 10

Vastus lateralis nerve supply

Answer 10

Femoral nerve L2, 3, 4.

Question 11

Vastus lateralis action.

Answer 11

Knee extension & acts as a stabiliser.

Question 12

Vastus lateralis function.

Answer 12

Standing up.

Question 13

Vastus Medialis origin.

Answer 13

Medial part intertrochanteric line, medial shaft of upper femur, med lip of linea aspera, med supracondylar line and adductor magnus tendon

Question 14

Vastus Medialis insertion

Answer 14

medial border of patella

Question 15

Vastus medialis nerve supply.

Answer 15

Femoral nerve L2, 3, 4.

Question 16

Vastus medialis action.

Answer 16

Knee extension & stabiliser.

Question 17

Vastus medialis function.

Answer 17

Standing up.

Question 18

Vastus Intermedius origin.

Answer 18

Upper two thirds of anterior and lateral surface of the femur

Question 19

Vastus intermedius insertion.

Answer 19

Base of the patella & blends with deep aspects of rectus femoris tendon.

Question 20

Vastus intermedius nerve supply

Answer 20

Femoral nerve L2, 3, 4.

Question 21

Vastus intermedius action.

Answer 21

Knee extension & stabiliser

Question 22

Vastus intermedius function.

Answer 22

Standing up.

Question 23

Tensor fascia lata Origin.

Answer 23

anterior one third of outer lip of Iliac Crest.

Question 24

Tensor fascia lata insertion

Answer 24

Blends into iliotibial tract inserts into the lateral aspect of patella tendon & thus the lateral aspect of the tibia.

Question 25

Tensor fascia lata nerve supply

Answer 25

Superior gluteal nerve L4, 5.

Question 26

Tensor fascia lata action

Answer 26

Flexion abduction and medial hip rotation
knee extension.

Question 27

Tensor fascia lata function

Answer 27

standing up