Knee Flexors

Question 1

Name the knee flexors.

Answer 1

Hamstrings, Gastrocnemius, Gracilis, Sartorius

Question 2

What muscles make up the hamstrings?

Answer 2

Biceps femoris semimembranosus & semitendinosus.

Question 3

Biceps femoris origin.

Answer 3

Ischial tuberosity of the innominate

Question 4

Biceps femoris insertion.

Answer 4

Head of fibula.

Question 5

Biceps femoris nerve supply.

Answer 5

Sciatic nerve L5, S1, 2.

Question 6

Biceps femoris actions.

Answer 6

Hip extension and knee flexion.

Question 7

Biceps femoris function.

Answer 7

stepping

Question 8

Semimembranosus origin.

Answer 8

Ischial tuberosity of the innominate

Question 9

Semimembranosus insertion.

Answer 9

Posteromedial surface of medial condyle of tibia.

Question 10

Semimembranosus nerve supply.

Answer 10

Sciatic nerve L5, S1, 2.

Question 11

Semimembranous actions.

Answer 11

Extension of the hip and flexion of the knee joint.

Question 12

Semimembranousus function

Answer 12

Stepping

Question 13

Semitendinosus origin.

Answer 13

Ischial tuberosity of the innominate

Question 14

Semitendinosus insertion.

Answer 14

Medial surface of the medial condyle of tibia.

Question 15

Semitendinosus nerve supply.

Answer 15

Sciatic nerve L5, S1, 2.

Question 16

Semitendinosus action.

Answer 16

Hip extension and knee flexion.

Question 17

Semitendinosus function.

Answer 17

Stepping

Question 18

Gastrocnemius origin.

Answer 18

Medial and lateral condyles of the femur.

Question 19

Gastrocnemius insertion.

Answer 19

Via the Achilles tendon into the posterior surface of the calcaneus.

Question 20

Gastrocnemius nerve supply.

Answer 20

Tibial nerve S1, 2.

Question 21

Gastrocnemius action.

Answer 21

Plantar flexion of the ankle, flexion of the knee.

Question 22

Gastrocnemius function.

Answer 22

Stepping.

Question 23

Sartorius origin.

Answer 23

Anterior superior iliac spine.

Question 24

Sartorius insertion.

Answer 24

Medial side of the body of the tibia.

Question 25

Sartorius nerve supply.

Answer 25

femoral nerve L2, 3.

Question 26

Sartorius action.

Answer 26

Hip and knee flexion. lateral rotation and abduction of the thigh. medial rotation of the tibia on the femur.

Question 27

Gracilis origin.

Answer 27

Front of the body of the pubis inferior pubic and ischial rami of the innominate.

Question 28

Gracilis insertion.

Answer 28

Medial surface of the tibial body.

Question 29

Gracilis nerve supply.

Answer 29

Obturator nerve L2, 3.

Question 30

Gracilis action.

Answer 30

Thigh adduction Knee flexion.

Question 31

Gracilis function.

Answer 31

Stepping.