Knee Muscles

Question 1

Origin of rectus femoris

Answer 1

Anterior inferior iliac spine (AIIS)

Question 2

Insertion of rectus femoris

Answer 2

Patella -> Patella tendon –> tibial tuberosity

Question 3

Action rectus femoris

Answer 3

Flex the hip, extend the knee

Question 4

Blood supply rectus femoris

Answer 4

Superficial femoral artery

Question 5

Innervation rectus femoris

Answer 5

Femoral nerve

Question 6

Origin of vastus medialis

Answer 6

Medial lip of linea aspera

Question 7

Insertion of vastus medialis

Answer 7

Patella -> patella tendon -> tibial tuberosity

Question 8

Action vastus medialis

Answer 8

Extend the knee

Question 9

Blood supply vastus medialis

Answer 9

Superficial and deep femoral artery

Question 10

Innervation of vastus medialis

Answer 10

Femoral nerve

Question 11

Origin vastus intermedius

Answer 11

Anterior lateral femur

Question 12

Insertion vastus intermedius

Answer 12

Patella -> patella tendon -> tibial tuberosity

Question 13

Action vastus intermedius

Answer 13

Extend the knee

Question 14

Blood supply vastus intermedius

Answer 14

Deep femoral artery

Question 15

Innervation vastus intermedius

Answer 15

Femoral nerve

Question 16

Origin vastus lateralis

Answer 16

Lateral lip linea aspera and greater trochanter

Question 17

Insertion vastus lateralis

Answer 17

Patella -> patellar tendon -> tibial tuberosity

Question 18

Action vastus lateralis

Answer 18

Extend the knee

Question 19

Blood supply vastus lateralis

Answer 19

Superficial femoral artery

Question 20

Innervation vastus lateralis

Answer 20

Femoral nerve

Question 21

Articularis genu origin

Answer 21

Anterior distal femoral shaft

Question 22

Articularis genu insertion

Answer 22

Knee joint capsule

Question 23

Articularis genu action

Answer 23

Pull knee joint capsule proximally during knee extension

Question 24

Articularis genu Innervation

Answer 24

Femoral nerve

Question 25

Articularis genu blood supply

Answer 25

Deep femoral artery

Question 26

Gracilis origin

Answer 26

Body and inferior ramus of pubis

Question 27

Gracilis insertion

Answer 27

Pes anserine (medial surface of proximal tibia

Question 28

Gracilis action

Answer 28

Flex the knee, Hip adduction, medial rotation of hip when knee flexed

Question 29

Gracilis blood supply

Answer 29

Medial circumflex femoral artery

Question 30

Gracilis innervation

Answer 30

Obturator nerve

Question 31

Biceps femoris (long) origin

Answer 31

Ischial tuberosity

Question 32

Biceps femoris (long) insertion

Answer 32

Head of fibula

Question 33

Biceps femoris (long) blood supply

Answer 33

Deep femoral artery

Question 34

Biceps femoris (long) innervation

Answer 34

Tibial nerve

Question 35

Biceps femoris (short) origin

Answer 35

Linea aspera

Question 36

Biceps femoris (short) insertion

Answer 36

Head of fibula

Question 37

Biceps femoris (long) action

Answer 37

Extend the hip, flex the knee, laterally rotate the knee

Question 38

Biceps femoris (short) action

Answer 38

Flex the knee, laterally rotate the knee

Question 39

Biceps femoris (short) innervation

Answer 39

Common fibular nerve

Question 40

Biceps femoris (short) blood supply

Answer 40

Popliteal artery

Question 41

Semimembranosus origin

Answer 41

Ischial tuberosity

Question 42

Semimembranosus insertion

Answer 42

Medial condyle of tibia

Question 43

Semimembranosus action

Answer 43

Extend the hip, flex the knee, medially rotate knee

Question 44

Semimembranosus blood supply

Answer 44

Deep femoral artery, popliteal artery

Question 45

Semimembranosus innervation

Answer 45

Tibial nerve

Question 46

Semitendinosus origin

Answer 46

Ischial tuberosity

Question 47

Semitendinosus insertion

Answer 47

Pes anserine (medial surface of proximal tibia)

Question 48

Semitendinosus action

Answer 48

Extend hip, flex the knee, medially rotate knee

Question 49

Semitendinosus blood supply

Answer 49

Deep femoral artery, popliteal artery

Question 50

Semitendinosus innervation

Answer 50

Tibial nerve

Question 51

Popliteus origin

Answer 51

Lateral femoral condyle

Question 52

Popliteus insertion

Answer 52

Proximal 1/3 posterior tibia

Question 53

Popliteus action

Answer 53

Medial rotation of tibia on femur, lateral rotation of femur on tibia

Question 54

Popliteus blood

Answer 54

Popliteal artery

Question 55

Popliteus innervation

Answer 55

Tibial nerve