Getting in Your Nerves

  • Published14 Aug 2015
  • Reviewed14 Aug 2015
  • Author Michael W. Richardson
  • Source BrainFacts/SfN

This image is a cross section of the sciatic nerve in a mouse, with individual cell nuclei in blue.

The signals that your brain uses to drive behavior are delivered to other parts of the body by electrical highways called nerves. Nerves are groups of axons, bundled together like a cord. The above image is a cross section of the sciatic nerve in a mouse, with individual cell nuclei in blue. The sciatic nerve begins in the lower spinal cord and has branches that stretch down to the toes. It contains both sensory and motor axons, allowing you to flex your legs and feel the ground beneath your feet.

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