sciatic nerve

sciatic nerve
either of a pair of nerves, the largest in the body, that originate in the sacral plexus of the lower back and extend down the buttocks to the back of the knees, where they divide into other nerves: the sciatic nerve and its branches innervate large areas of the pelvis, leg, and foot.
[1735-45]

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      largest and thickest nerve of the human body that is the principal continuation of all the roots of the sacral plexus. It emerges from the spinal cord in the lumbar portion of the spine and runs down through the buttocks and the back of the thigh; above the back of the knee it divides into the tibial and the common peroneal nerve, both of which serve the lower leg and foot.

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Universalium. 2010.

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Look at other dictionaries:

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  • sciatic nerve — noun arises from the sacral plexus and passes about halfway down the thigh where it divides into the common peroneal and tibial nerves • Syn: ↑nervus ischiadicus • Hypernyms: ↑nerve, ↑nervus • Part Holonyms: ↑leg * * * noun, pl ⋯ nerves [count] …   Useful english dictionary

  • sciatic nerve — noun Date: 1741 either of the pair of largest nerves in the body that arise one on each side from the nerve plexus supplying the posterior limb and pelvic region and that pass out of the pelvis and down the back of the thigh …   New Collegiate Dictionary

  • sciatic nerve — noun A large nerve that starts in the lower back and runs through the buttock and down the lower limb …   Wiktionary

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