Lower Limb - Neurovascular Structures of Gluteal/Posterior Thigh (2)

Question 1

What are the spinal origins of the sciatic nerve?

Answer 1

Sacral plexus: L4-S3

Question 2

What are the two major divisions of the sciatic nerve?

Answer 2

Common fibular nerve

Tibial nerve

Question 3

What are the spinal origins of the pudendal nerve?

Answer 3

Sacral plexus: S2-S4

Question 4

Where does the sciatic nerve bifurcate into its tibial and common fibular nerves?

Answer 4

At the apex of the popliteal fossa.

Question 5

Briefly describe what the sciatic nerve supplies.

Answer 5

The sciatic nerve supplies no structures in the gluteal region. It supplies the posterior thigh muscles, all leg and foot muscles, and the skin of most of the leg and the foot.