Bifurcated ligament

Bifurcated ligament
The ligaments of the foot from the lateral aspect (bifurcated ligament labeled at upper right)
Talocalcaneal and talocalcaneonavicular articulations exposed from above by removing the talus
(bifurcated ligament labeled at upper right)
Tocuboid and navicular bone
LatinLigamentum bifurcatum
Anatomical terminology

The bifurcated ligament (internal calcaneocuboid, interosseous ligament or bifurcate ligament) is a strong band, attached behind to the deep hollow on the upper surface of the calcaneus and dividing in front in a Y-shaped manner into a calcaneocuboid and a calcaneonavicular part.

  • The calcaneocuboid ligament (ligamentum calcaneocuboideum) is fixed to the medial side of the cuboid and forms one of the principal bonds between the first and second rows of the tarsal bones.
  • The calcaneonavicular ligament (ligamentum calcaneonaviculare) is attached to the lateral side of the navicular. (Note this is NOT the spring ligament which is commonly called the plantar calcaneonavicular ligament).

It is commonly injured in "sprain-type" inversion injuries producing an avulsion fracture at the anterolateral process of the calcaneus.[1]


This article incorporates text in the public domain from page 354 of the 20th edition of Gray's Anatomy (1918)

  1. ^ David A. Porter (2008). Baxter, Donald E.; Porter, David A.; Schon, Lew (eds.). Baxter's The Foot and Ankle in Sport (2nd (illustrated) ed.). Amsterdam, Netherlands: Elsevier Health Sciences. p. 297. ISBN 9780323023580.

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