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Cuneiform bones The medial, intermediate and lateral cuneiforms are three small tarsal bones, bones of the hind foot. They are wedge-shaped and their shape helps to create the transverse arch of the foot. Posteriorly, all three cuneiforms articulate with the navicular bone; anteriorly they articulate with the 1-3 metatarsals of the toes. The intermediate cuneiform is not as long as the first and third, so that the base of the second metatarsal sits firmly and securely in a three-sided bony recess. In the upper limb, this is of importance because you use the second (fore-) finger to "poke" or "prod" with, but it is not clear that the arrangement has significance in the foot. The undersurface of the cuneiforms provide attachment for muscles, notably the expanded insertion of tibialis posterior, an invertor of the foot. |