Posterior Thigh

Question 1

What is the origin of the short head of biceps femoris?

Answer 1

Lateral lip of linea aspera

Question 2

What is the origin of the long head of biceps femoris, semitendinosus and semimembranosus?

Answer 2

Ischial tuberosity

Question 3

What is the insertion of both heads of biceps femoris?

Answer 3

(lateral side) Head of fibula

Question 4

What is the insertion of semitendinosus?

Answer 4

Medial surface of proximal tibia. (pes anserinus)

Question 5

What is the insertion of semimembranosus?

Answer 5

Medial tibial condyle

Question 6

What is the innervation of the short head of biceps femoris?

Answer 6

Common fibular nerve (L5, S1, S2) (mainly S1)

Question 7

What is the innervation of the long head of biceps femoris, semimembranosus and semitendinosus?

Answer 7

Tibial Nerve (L5, S1, S2) (mainly S1)

Question 8

What is the action of semitendinosus and semimembranosus?

Answer 8

Flexion of Knee and Extension of Hip

Question 9

What is the action of the short head of biceps femoris?

Answer 9

Laterally rotate leg and flexion of knee

Question 10

What is the action of the long head of biceps femoris?

Answer 10

Laterally rotate leg, flexion of knee and extension of hip