The metatarsophalangeal joints (MTP) are synovial joints that connect the metatarsal bones of the foot to the proximal phalanges of the toes. In these joints, the heads of metatarsal bones articulate with the corresponding bases of proximal phalanges.

Between the heads of the metatarsal bones and the bottoms of the proximal phalanges (your toe bones) are the metatarsophalangeal joints. In other words, metatarsophalangeal joints connect your toe bones to your foot bones. These joints are surrounded by a thin joint capsule and have ligaments that support them.

The metatarsophalangeal joints (MTP joints) are the joints between the metatarsal bones of the foot and the proximal bones (proximal phalanges) of the toes. They are analogous to the knuckles of the hand, and are consequently known as toe knuckles in common speech.