Brain Byte

Motor Neurons

  • Published15 Apr 2020
  • Author Calli McMurray
  • Source BrainFacts/SfN

Motor neurons carry movement instructions from the brain and spinal cord to muscles throughout the body. Their nerve fibers are the longest in the body — a single axon can stretch from the base of the spinal cord all the way to the toes.

Brain Bytes showcase essential facts about neuroscience.

brain byte card motor neuron
Design by A. Tong

Design by Adrienne Tong.

Image: Fayette A. Reynolds, Berkshire Community College Bioscience Image Library



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