Third metatarsal

Os metatarsi III

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What it is
Long bone of the forefoot behind the third toe, with a wedge-shaped base, slender shaft and rounded head at the ball of the foot.
Function
Forms a spoke of the foot's arches and a lever for walking.
Size
≈ 73 mm long
Clinical note
Bunions (hallux valgus) develop at the first metatarsal head.

Nearby skeletal structures Fifth metatarsal, First metatarsal, Fourth metatarsal, Intermediate cuneiform, Lateral cuneiform, Medial cuneiform, Proximal phalanx of the fourth toe, Proximal phalanx of the little toe, Proximal phalanx of the third toe, Second metatarsal