Posterior Thigh Muscles

Question 1

Semitendinosus Origin

Answer 1

Ischial Tuberosity

Question 2

Semitendinosus Insertion

Answer 2

Medial surface of superior part of tibia (Pes Anserinus)

Question 3

Semitendinosus Innervation

Answer 3

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

Question 4

Semitendinosus Action

Answer 4

Extend thigh
Flex leg
Medially rotate leg

Question 5

Semimembranosus Origin

Answer 5

Ischial Tuberosity

Question 6

Semimembranosus Insertion

Answer 6

Posterior part of medial condyle of tibia

Question 7

Semimembranosus Innervation

Answer 7

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

Question 8

Semimembranosus Action

Answer 8

Extend thigh
Flex leg
Medially rotate leg

Question 9

Biceps Femoris (Short & Long heads) Origin

Answer 9

Long head: Ischial tuberosity

Short head: Linea aspera & Lateral supracondylar line of femur

Question 10

Biceps Femoris (Short & Long heads) Insertion

Answer 10

Lateral side of head of fibula

Tendon is split at this site by fibular collateral ligament of knee

Question 11

Biceps Femoris (Short & Long heads) Innervation

Answer 11

Long head: Tibial division of sciatic nerve (L5, S1, S2)

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

Question 12

Biceps Femoris (Short & Long heads) Action

Answer 12

Flexes leg and rotates it laterally when knee is flexed