First metatarsal bone

The first metatarsal bone is the most massive but also the shortest and widest metatarsal bone. Its base articulates with the medial cuneiform (articular surface for the medial cuneiform), and the lateral side of the base may also connect with the second metatarsal bone. Additionally, the base of the bone has a tuberosity of the first metatarsal bone. In contrast, the head of the first metatarsal bone articulates with the base of the proximal phalanx (articular surface for the proximal phalanx).