Navicular

Os naviculare

SkeletalSkeletonLegLeft and right

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What it is
Boat-shaped bone on the medial side of the midfoot between the talar head and the three cuneiforms, with a palpable medial tuberosity.
Function
Keystone of the medial longitudinal arch; receives the tibialis posterior tendon.
Size
≈ 3 × 2 × 1.2 cm
Clinical note
Stress fractures occur in sprinters and jumpers.

Nearby skeletal structures Calcaneus, Cuboid, First metatarsal, Fourth metatarsal, Intermediate cuneiform, Lateral cuneiform, Medial cuneiform, Second metatarsal, Talus, Third metatarsal