3 Questions
What is the origin of the sciatic nerve?
Spinal nerves L4 to S3
What is the typical location where the sciatic nerve divides into the common peroneal and tibial nerves?
At the apex of the popliteal fossa
What is the main function of the sciatic nerve?
Supplies the posterior thigh muscles, all leg and foot muscles, and the skin of most of the leg and foot
Study Notes
- The sciatic nerve is the largest branch of the sacral plexus.
- It is formed from both anterior and posterior divisions of spinal nerves L4 to S3.
- The sciatic nerve emerges through the greater sciatic foramen inferior to the piriformis.
- It runs under cover of the gluteus maximus.
- At the apex of the popliteal fossa, the nerve typically divides into the common peroneal and tibial nerves.
- The sciatic nerve receives a named branch of the inferior gluteal artery.
- It 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 foot.
- It also supplies the articular branches to all joints of the lower limb.
- The sciatic nerve is 2cm wide.
Test your knowledge about the largest nerve in the human body - the sciatic nerve! Learn about its formation, path, and branches. Explore its role in supplying the lower limb muscles and joints, and discover interesting facts like its size and blood supply. Take this quiz to become an expert on the sciatic nerve!
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