Reference Terms
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Sciatic nerve
The sciatic nerve is a large nerve that runs down the lower limb. It is the longest single nerve in the body. Pain caused by a compressed or damaged sciatic nerve is called sciatica.
Arising from the lower part of the sacral plexus, the sciatic nerve enters the gluteal (buttock) region by the greater sciatic foramen of the hip bone. It continues down the posterior (rear) compartment of the thigh, until it separates into the tibial nerve and the common peroneal nerve. The location of this division varies between people.
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September 5, 2025
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