Muscles that flex the knee

Question 1

Gracilis
(origin)

Answer 1

Inferior ramus of pubis, ramus of ischium

Question 2

Gracilis
(insertion)

Answer 2

Medial surface of proximal tibia (pes anserine), distal to medial condyle

Question 3

Gracilis
(action)

Answer 3

Adduct hip, Medially rotate hip if knee flexed, knee flexion

Question 4

Gracilis
(innervation)

Answer 4

Obturator nerve

Question 5

Biceps Femoris long head
(origin)

Answer 5

ischial tuberosity

Question 6

Biceps femoris long head
(insertion)

Answer 6

head of the fibula

Question 7

Biceps femoris long head
(action)

Answer 7

Extend hip, flex knee, laterally rotate knee

Question 8

Biceps femoris long head
(innervation)

Answer 8

tibial nerve

Question 9

Biceps femoris short head
(origin)

Answer 9

linea aspera of femur

Question 10

Biceps femoris short head
(insertion)

Answer 10

head of fibula

Question 11

Biceps femoris short head
(action)

Answer 11

flex knee, laterally rotate knee

Question 12

Biceps femoris short head
(innervation)

Answer 12

common fibular nerve

Question 13

Semimembranosus
(origin)

Answer 13

ischial tuberosity

Question 14

Semimembranosus
(insertion)

Answer 14

medial condyle of tibia posterior side

Question 15

Semimembranosus
(action)

Answer 15

extend hip, flex knee, medially rotate knee

Question 16

Semimembranosus
(innervation)

Answer 16

tibial nerve

Question 17

Semitendinosus
(origin)

Answer 17

ischial tuberosity

Question 18

Semitendinosus
(insertion)

Answer 18

medial surface of proximal tibia (pes anserine), distal to medial condyle

Question 19

Semitendinosus
(action)

Answer 19

extend hip, flex knee, medially rotate knee

Question 20

Semitendinosus
(innervation)

Answer 20

tibial nerve

Question 21

Popliteus
(origin)

Answer 21

lateral femoral condyle

Question 22

Popliteus
(insertion)

Answer 22

proximal 1/3 of posterior tibia (proximal to soleal line)

Question 23

Popliteus
(action)

Answer 23

medial rotation of tibia on femur, lateral rotation of femur on tibia, flex knee

Question 24

Popliteus
(innervation)

Answer 24

tibial nerve

Question 25

Sartorius (origin)

Answer 25

Anterior Superior Iliac Spine

Question 26

Sartorius (insertion)

Answer 26

Medial Surface of proximal tibia (pes ansrine) distal to tibial tuberosity

Question 27

Sartorius (action)

Answer 27

Flex, abduct, laterally rotate hip, flex knee

Question 28

Sartorius (innervation)

Answer 28

Femoral nerve