Posterior Compartment of the thigh

Question 1

Semitendinosus

Answer 1

P: Ischial tuberosities

D: medial superior tibia

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

A: Extends thigh, flexes leg, rotates medially if knee flexed, when thigh and leg flexed can extend trunk

Question 2

Semimembranosus

Answer 2

P: Ischial tuberosity

D: Posterior medial condyle of tibia (forms oblique popliteal ligament)

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

A: extends thigh, flexes leg, rotates flexed knee medially, if thigh and leg flexed can extend trunk

Question 3

Biceps femoris

Long head

Answer 3

P: Ischial tuberosity

D. Lateral head of fibula

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

A: Flexes leg, rotates laterally if knee is flexed, extends thigh

Question 4

Biceps Femoris

Short head

Answer 4

P: linea aspera & lateral supracondylar line of femur

D: lateral side of fibula head

N: common fibular division of sciatic nerve (L5, S1, S2)

A: Flexes leg, rotates laterally if knee flexed, extends thigh