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The interphalangeal joints of the foot are between the phalanx bones of the toes in the feet.
Since the great toe only has two phalanx bones , it only has one interphalangeal joint, which is often abbreviated as the "IP joint". The rest of the toes each have three phalanx bones , so they have two interphalangeal joints: the proximal interphalangeal joint between the proximal and middle phalanges and the distal interphalangeal joint between the middle and distal phalanges.
All interphalangeal joints are ginglymoid joints, and each has a plantar and two collateral ligaments. In the arrangement of these ligaments, extensor tendons supply the places of dorsal ligaments, which is similar to that in the metatarsophalangeal articulations.
Toe bones or phalanges of the foot. Note the big toe has no middle phalanx. People vary; sometimes the smallest toe also has none.