Lumbricals (Foot)

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.
  By TeachMeSeries Ltd (2025)

  

  Fig 2
  The second layer of the plantar muscles.