Popliteal Fossa & Knee

Question 1

Quadriceps Femoris Muscles

Answer 1

Rectus Femoris
Vastus Lateralis
Vastus Medialis
Vastus Intermedius

Question 2

Rectus Femoris Origin

Answer 2

Anterior inferior iliac spine and ilium superior to acetabulum

Question 3

Vastus Lateralis Origin

Answer 3

Greater trochanter and lateral lip of linea aspera of femur

Question 4

Vastus medialis origin

Answer 4

Intertrochanteric line and medial lip of linea aspera of femur

Question 5

Vastus Intermedius Origin

Answer 5

Anterior and lateral surfaces of shaft of femur

Question 6

Quadriceps Femoris Insertion

Answer 6

Common tendinous ( quardriceps tendon )and independent attachments to patella; indirectly to tibial tuberosity via patellar ligament. (Medial and lateral vasti also attach to the tibia and patella via aponeuroses- medial and lateral retiniacula)

Question 7

Quadriceps Femoris Action

Answer 7

Extend leg at knee joint; rectus femoris also steadies hip joint and help flex thigh

Question 8

Quadriceps Femoris Innervation

Answer 8

Femoral Nerve (L2,L3,L4)

Question 9

Semimembranosus Origin

Answer 9

Ischial Tuberosity

Question 10

Semimembranosus Insertion

Answer 10

Posterior part of medial condyle of tibia

Question 11

Semimembranosus Action

Answer 11

Extend thigh; flex leg and rotate it medial when knee is flexed; extends trunk when thigh and leg are flexed

Question 12

Semimembranosus Innervation

Answer 12

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

Question 13

Semitendinosus Origin

Answer 13

Ischial Tuberosity

Question 14

Semitendinosus Insertion

Answer 14

Medial surface of superior part of tibia

Question 15

Semitendinosus Action

Answer 15

Extend thigh; flex leg and rotate it medial when knee is flexed; extends trunk when thigh and leg are flexed

Question 16

Semitendinosus Innervation

Answer 16

Tibial division of sciatic part of tibia (L5, S1, S2)

Question 17

Gracilis Origin

Answer 17

Body and inferior ramus of pubis

Question 18

Gracilis Insertion

Answer 18

Superior part of medial surface of tibia

Question 19

Gracilis Action

Answer 19

Adducts thigh; flexes leg; helps rotate leg medially

Question 20

Gracilis Innervation

Answer 20

Obturator Nerve (L2,L3)

Question 21

Sartorius Origin

Answer 21

Anterior superior iliac spine and superior part of notch inferior to it

Question 22

Sartorius Insertion

Answer 22

Superior part of medial surface of tibia

Question 23

Sartorius Action

Answer 23

Flexes, abducts, and laterally rotates thigh at hip joint; flexes leg at knee joint, medially rotates leg when knee is flexed

Question 24

Sartorius Innervation

Answer 24

Femoral nerve (L2,L3)

Question 25

Biceps femoris Long Head Origin

Answer 25

Ischial Tuberosity

Question 26

Biceps Femoris Short head Origin

Answer 26

Linea aspera and lateral supracondylar line of femur

Question 27

Biceps Femoris Insertion

Answer 27

Lateral side of head of fibula

Question 28

Biceps Femoris Action

Answer 28

Flexes leg and rotates it laterally when knee is flexed; extends thigh

Question 29

Biceps Femoris Long Head Innervation

Answer 29

Tibial division of sciatic nerve (L5,S1,S2)

Question 30

Biceps Femoris Short Head Innervation

Answer 30

Common fibular division of sciatic nerve (L5,S1,S2)

Question 31

Hamstring Part of Adductor Magnus Origin

Answer 31

Ischial Tuberosity

Question 32

Hamstring Part of Adductor Magnus Insertion

Answer 32

Adductor Tubercle of femur

Question 33

Hamstring Part of Adductor Magnus Action

Answer 33

Adducts and Extends thigh

Question 34

Hamstring Part of Adductor Magnus Innervation

Answer 34

Tibial part of sciatic nerve (L4)

Question 35

Popliteus Origin

Answer 35

Lateral surface of lateral condyle of femur and lateral meniscus

Question 36

Popliteus Insertion

Answer 36

Posterior surface of tibia superior to soleal line

Question 37

Popliteus Action

Answer 37

Weakly flexes knee and unlocks it by rotating femur on flexed tibia; medially rotates tibia of unplanted limb

Question 38

Popliteus Innervation

Answer 38

Tibial nerve (L4,L5,S1)

Question 39

Plantaris Origin

Answer 39

Inferior end of lateral supracondylar line of femur; oblique popliteal ligament

Question 40

Plantaris Insertion

Answer 40

Posterior surface of calcaneus via calcaneal tendon (achilles)

Question 41

Plantaris Action

Answer 41

Weakly assists gastrocnemius in plantarflexing ankle

Question 42

Plantaris Innervation

Answer 42

Tibial nerve (S1,S2)