Posterior Thigh

Question 1

Biceps femoris Origin

Answer 1

Long head: ischial tuberosity
Short head: linea aspera and lateral supracondylar line
of femur

Question 2

Biceps Femoris Insertion

Answer 2

head of fibular

Question 3

Biceps Femoris Innervation

Answer 3

Long head: tibial division of the sciatic nerve (L5, S1, S2)
Short head: common fibular division of sciatic nerve(L5, S1, S2)

Question 4

Biceps Femoris Action

Answer 4

Hip joint: extension, external rotation; stabilizes pelvis
Knee joint: leg flexion, leg external rotation

Question 5

Biceps Femoris Arterial Supply

Answer 5

Inferior gluteal a., perforating aa., popliteal a.

Question 6

Semitendinosus Origin

Answer 6

ischial tuberosity

Question 7

Semitendinosus Insertion

Answer 7

Medial surface of the superior
part of tibia. (Pes anserinus)

Question 8

Semitendinosus Innervation

Answer 8

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

Question 9

Semitendinosus Action

Answer 9

Hip joint: It extends thigh, medially rotates thigh.
Knee joint: Flexes and medially rotates leg.

Question 10

Semitendinosus Arterial Supply

Answer 10

First perforating branch of deep femoral a., medial
femoral circumflex a., inferior gluteal a. and inferior medial
geniculate a.

Question 11

Semimembranosus Origin

Answer 11

ischial tuberosity

Question 12

Semimembranosus Insertion

Answer 12

Posterior part of medial tibial
condyle

Question 13

Semimembranosus Innervation

Answer 13

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

Question 14

Semimembranosus Action

Answer 14

Hip joint: thigh extension and internal rotation.
Knee joint: flexion and internal rotation of the leg
Stabilizes pelvis

Question 15

Semimembranosus Arterial Supply

Answer 15

Perforating branches of femoral and
popliteal arteries

Question 16

Gastrocnemius Origin

Answer 16

lateral head – lateral aspects of lateral
condyle of femur
Medial head – popliteal surface of femur,
superior to medial condyle

Question 17

Gastrocnemius Insertion

Answer 17

Posterior surface of
calcaneus via calcaneal tendon (Achilles
tendon)

Question 18

Gastrocnemius Innervation

Answer 18

Tibial nerve (S1, S2)

Question 19

Gastrocnemius Action

Answer 19

plantar flexes ankle when knee is
extended, raises heel during walking, and
flexes knee joint

Question 20

Gastrocnemius Arterial Supply

Answer 20

branches of the popliteal a

Question 21

Plantaris Origin

Answer 21

Lateral supracondylar
line of femur, oblique popliteal ligament of
knee

Question 22

Plantaris Insertion

Answer 22

Posterior surface of
calcaneus (via calcaneal tendon)

Question 23

Plantaris Innervation

Answer 23

tibial nerve (S1, S2)

Question 24

Plantaris Action

Answer 24

Foot plantar flexion; Knee flexion

Question 25

Plantaris Arterial Supply

Answer 25

Superficially: lateral sural and popliteal arteries; Deeply: superior lateral genicular artery

Question 26

Soleus Origin

Answer 26

Soleal line, medial border of tibia, head of fibula, posterior border of fibula. (Soleal tendinous arch)

Question 27

Soleus Insertion

Answer 27

Posterior surface of calcaneus (via calcaneal tendon)

Question 28

Soleus Innervation

Answer 28

tibial nerve (S1, S2)

Question 29

Soleus Action

Answer 29

Talocrural joint: Foot plantar flexion

Question 30

Soleus Arterial Supply

Answer 30

Posterior tibial artery

Question 31

Popliteus Origin

Answer 31

lateral surface of lateral condyle of femur and lateral meniscus

Question 32

Popliteus Insertion

Answer 32

posterior surface of tibia, superior to soleal line

Question 33

Popliteus Innervation

Answer 33

tibial nerve (L4, L5, S1)

Question 34

Popliteus Action

Answer 34

weakly flexes knee and unlocks it by laterally rotating femur on fixed tibia, may also medially rotate tibia of unplanted limb

Question 35

Popliteus Arterial Supply

Answer 35

branches of the popliteal a

Question 36

Adductor Magnus Origin

Answer 36

Adductor part – inferior ramus of pubis, ramus of ischium Hamstring part – ischial tuberosity

Question 37

Adductor Magnus Insertion

Answer 37

Adductor part – gluteal tuberosity, linea aspera, medial supracondylar line. Hamstring part – adductor tubercle of femur

Question 38

Adductor Magnus Innervation

Answer 38

Adductor part – Obturator nerve (L2, L3, L4) Hamstring part – tibial part of sciatic nerve (L4)

Question 39

Adductor Magnus Action

Answer 39

Adductor part --Adducts hip joint; adductor part flexes hip. Hamstring part -- Extends hip joint

Question 40

Adductor Magnus Arterial Supply

Answer 40

deep femoral, obturator, and femoral aa