Quadratus Plantae

Written by Sanya Trikha

Last updated January 31, 2023 • 11 Revisions

The quadratus plantae is an intrinsic muscle of the foot. It is located within the second plantar muscle layer of the foot, and is a square-shaped muscle with two heads of origin.

  • Attachments: Originates from the medial and lateral plantar surface of the calcaneus. It attaches to the tendons of flexor digitorum longus.
  • Actions: Assists the flexor digitorum longus in flexion of the lateral four toes.
  • Innervation: Lateral plantar nerve (branch of the tibial nerve)
  • Blood Supply: Medial and lateral plantar arteries.

Fig 1
The second layer of the plantar muscles.

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