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Myotomes

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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A myotome is a group of muscles innervated by a specific spinal segment. Some important myotomes are:

  • C6 - biceps, brachioradialis, radial extensors of the wrist
  • C7 - triceps, ulnar extensors of wrist, finger extensors
  • C8 - finger flexors
  • L4 - quadriceps femoris
  • L5 - extensor hallucis longus
  • S1 - plantar flexors

N.B.: for information concerning the segmental nerve supply of certain movements then see movements section.

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