Lumbricals (Foot)

Written by Sanya Trikha

Last updated September 18, 2023 • 4 Revisions

The lumbricals are a set of intrinsic muscles of the foot. They are located within the second plantar muscle layer of the foot.

  • Attachments: Originates from the tendons of flexor digitorum longus. Attaches to the extensor hoods of the lateral four digits.
  • Actions: Flexion at the metatarsophalangeal joints and extension at the interphalangeal joints.
  • Innervation:
    • Medial lumbrical – medial plantar nerve.
    • Lateral three lumbricals – lateral plantar nerve.
  • Blood Supply:  Lateral plantar artery and the plantar metatarsal arteries.

    Fig 2
    The second layer of the plantar muscles.

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