Posterior Thigh and Popliteal Fossa

Question 1

Semitendinosus

Answer 1

• Action: Extend thigh; flex leg (med. rotate)

- Innervation: Tibial division of sciatic nerve

Question 2

Semimembranosus

Answer 2

• Action: Extend thigh; flex leg

- Innervation: Tibial division of sciatic nerve

Question 3

Biceps femoris (long head)

Answer 3

• Action: Flex leg; extend thigh

- Innervation: Tibial division of sciatic nerve

Question 4

Biceps femoris (short head)

Answer 4

• Action: Only flexed leg

- Innervation: Common fibular branch of the sciatic

Question 5

Adductor magnus

Answer 5

• Action: Extend thigh

- Innervation: Tibial division of sciatic nerve

Question 6

Popliteal fossa contents (superficial to deep)

Answer 6

• Nerves
• Popliteal vein, lymph nodes, and branches
• Popliteal artery and branches