Thigh, Hip, + Knee Muscles

Question 1

Rectus Femoris Action

Answer 1

• extends knee
• steadies hip joint
• helps iliopsoas flex hip joint

Question 2

Rectus Femoris PA

Answer 2

anterior inferior iliac spine (AIIS), ilium

Question 3

Rectus Femoris DA

Answer 3

quadriceps tendon to tibial tuberosity via patellar ligament

Question 4

Rectus Femoris Innervation

Answer 4

femoral nerve (L2, L3, L4)

Question 5

Vastus Lateralis Action

Answer 5

extend knee

Question 6

Vastus Lateralis PA

Answer 6

greater trochanter, lateral lip of linea aspera

Question 7

Vastus Lateralis DA

Answer 7

quadriceps tendon to tibial tuberosity via patellar ligament, also attach to tibia and patella via aponeuroses (lateral patellar retinacula)

Question 8

Vastus Lateralis Innervation

Answer 8

femoral nerve (L2, L3, L4)

Question 9

Vastus Medialis Action

Answer 9

extend knee

Question 10

Vastus Medialis PA

Answer 10

intertrochanteric line, medial lip of linea aspera

Question 11

Vastus Medialis DA

Answer 11

quadriceps tendon to tibial tuberosity via patellar ligament, also attach to tibia and patella via aponeuroses (medial patellar retinacula)

Question 12

Vastus Medialis Innervation

Answer 12

femoral nerve (L2, L3, L4)

Question 13

Vastus Intermedius Action

Answer 13

extend knee

Question 14

Vastus Intermedius PA

Answer 14

anterior and lateral shaft of femur

Question 15

Vastus Intermedius DA

Answer 15

quadriceps tendon to tibial tuberosity via patellar ligament

Question 16

Vastus Intermedius Innervation

Answer 16

femoral nerve (L2, L3, L4)

Question 17

Popliteus Action

Answer 17

• unlocks knee by rotating femur 5 degrees on fixed tibia
• medially rotates tibia of unplanted limb

Question 18

Popliteus PA

Answer 18

lateral condyle of femur, lateral meniscus

Question 19

Popliteus DA

Answer 19

posterior tibia above soleal line

Question 20

Popliteus Innervation

Answer 20

tibial nerve (L4, L5, S1)

Question 21

Semitendinosus Action

Answer 21

• extend hip
• flex knee and medially rotate it when flexed
• when hip and knee joints are flexed (as when sitting), extend trunk at hip joint (to rise)

Question 22

Semitendinosus PA

Answer 22

ischial tuberosity

Question 23

Semitendinosus DA

Answer 23

pes anserinus of tibia

Question 24

Semitendinosus Innervation

Answer 24

tibial division of sciatic nerve part of tibia (L5, S1, S2)

Question 25

Semimembranosus Action

Answer 25

• extend hip
• flex knee and medially rotate it when flexed
• when hip and knee joints are flexed (as when sitting), extend trunk at hip joint (to rise)

Question 26

Semimembranosus PA

Answer 26

ischial tuberosity

Question 27

Semimembranosus DA

Answer 27

posterior medial tibial condyle, reflected attachment forms oblique popliteal ligament (to lateral femoral condyle)

Question 28

Semimembranosus Innervation

Answer 28

tibial division of sciatic nerve part of tibia (L5, S1, S2)

Question 29

Biceps Femoris Action

Answer 29

• flex knee and laterally rotate it when flexed
• long head: extend hip

Question 30

Biceps Femoris PA

Answer 30

• long head: ischial tuberosity
• short head: linea aspera, lateral supracondylar line

Question 31

Biceps Femoris DA

Answer 31

lateral side of fibular head; tendon is split at this site by fibular collateral ligament (LCL) of knee

Question 32

Biceps Femoris Innervation

Answer 32

• long head: tibial division of sciatic nerve (L5, S1, S2)
• short head: common fibular division of sciatic nerve (L5, S1, S2)