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sciatic nerve

noun, Anatomy
1.
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.
Origin of sciatic nerve
1735-1745
1735-45
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for sciatic nerve
  • It is caused by injury to or pressure on the sciatic nerve.
  • Some cases of sciatica pain may occur when a muscle located deep in the buttocks pinches the sciatic nerve.
  • The peroneal nerve is a branch of the sciatic nerve, which supplies movement and sensation to the lower leg, foot and toes.
  • It occurs when there is damage to the tibial nerve, one of the lower branches of the sciatic nerve of the leg.
sciatic nerve in Medicine

sciatic nerve n.
A nerve that arises from the sacral plexus and passes through the greater sciatic foramen to about the middle of the thigh where it divides into the common peroneal and tibial nerves.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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sciatic nerve in Science
sciatic nerve
  (sī-āt'ĭk)   
A thick nerve that arises in the lower part of the spine and passes through the pelvis on its way to the back of the leg. It carries sensory information from the leg to the central nervous system and controls the action of many muscles. The sciatic nerve is the largest nerve in the body.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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