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.

Look at other dictionaries:

  • Sciatic nerve — Nerve: Sciatic Nerve Latin nervus ischiadicus Gray s subject #213 960 Innervates Lateral rotator …   Wikipedia

  • sciatic nerve — ► NOUN Anatomy ▪ a major nerve extending from the lower end of the spinal cord down the back of the thigh …   English terms dictionary

  • Sciatic nerve — The largest nerve in the body, the sciatic nerve begins from nerve roots in the lumbar part of the spinal cord (in the low back) and extends through the buttock area to send nerve endings down to the legs. Pain resulting from irritation of the… …   Medical dictionary

  • sciatic nerve — the major nerve of the leg and the nerve with the largest diameter. It runs down behind the thigh from the lower end of the spine; above the knee joint it divides into two main branches, the tibial and common peroneal nerves, which are… …   The new mediacal dictionary

  • 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

  • sciatic nerve — n. (Anatomy) largest main nerve in the body running down from the lower end of the spinal cord to the back of the muscle of the thigh and extends through the buttock endings down at the legs …   English contemporary dictionary

  • sciatic nerve — noun Anatomy a major nerve extending from the lower end of the spinal cord down the back of the thigh …   English new terms dictionary

  • sciatic nerve — sciat′ic nerve′ n. anat. either of a pair of nerves 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 • Etymology: 1735–45 …   From formal English to slang

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