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Navicular
From WikiSM
Contents
Description
- Navicular derives its name from its resemblance to a small boat
- Suggested by its concave proximal articular surface
- Articulates with
- 3 Cuneiforms distally
- Head of Talus proximally
- Cuboid laterally
- Location
- Uppermost portion of the arch of the foot
- Often referred to as the 'keystone' of the arch[1]
- Description
- 6-sided, horseshoe-shaped disk
- Soft tissue stabilizers
- Plantar and dorsal ligaments reinforce each articulation
- Posterior Tibial Tendon
- Plantar calcaneonavicular (spring) ligament
- Anterior fibers of Deltoid Ligament
Actions
Vascular Supply
- Branches of
- Dorsalis Pedis Artery supply the dorsum
- Medial plantar branch of the Posterior Tibial Artery supply plantar surface
- Middle 1/3 receives its blood supply from anastamosis of the two arteries
- Renders middle 1/3 largely avascular, making it vulnerable to stress fractures, non-union
Innervation
Clinical Significance
See Also
References
- ↑ Eichenholtz SN, Levine DB. Fractures of the tarsal navicular bone. Clin Orthop Relat Res. 1964; 34:142-157.