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 (proximal and distal phalanges), it only has one interphalangeal joint, which is often abbreviated as the "IP joint". The rest of the toes each have three phalanx bones (proximal, middle, and distal phalanges), so they have two interphalangeal joints: the proximal interphalangeal joint between the proximal and middle phalanges (abbreviated "PIP joint") and the distal interphalangeal joint between the middle and distal phalanges (abbreviated "DIP joint"). All interphalangeal joints are

ginglymoid A hinge joint (ginglymus or ginglymoid) is a bone joint in which the articular surfaces are molded to each other in such a manner as to permit motion only in one plane. According to one classification system they are said to be uniaxial (having ...

(hinge) joints, and each has a plantar (underside) and two

collateral Collateral may refer to: Business and finance * Collateral (finance), a borrower's pledge of specific property to a lender, to secure repayment of a loan * Marketing collateral, in marketing and sales Arts, entertainment, and media * ''Collate ...

ligament A ligament is the fibrous connective tissue that connects bones to other bones. It is also known as ''articular ligament'', ''articular larua'', ''fibrous ligament'', or ''true ligament''. Other ligaments in the body include the: * Peritoneal li ...

s. In the arrangement of these ligaments, extensor

tendons A tendon or sinew is a tough, high-tensile-strength band of dense fibrous connective tissue that connects muscle to bone. It is able to transmit the mechanical forces of muscle contraction to the skeletal system without sacrificing its ability ...

supply the places of dorsal ligaments, which is similar to that in the metatarsophalangeal articulations.

Movements

The only movements permitted in the joints of the digits are flexion and

extension Extension, extend or extended may refer to: Mathematics Logic or set theory * Axiom of extensionality * Extensible cardinal * Extension (model theory) * Extension (predicate logic), the set of tuples of values that satisfy the predicate * E ...

; these movements are more extensive between the first and second phalanges than between the second and third. The flexor hallucis longus and flexor digitorum longus flex the interphalangeal joint of the big toe and lateral four toes, respectively. The tendons of both of these muscles cross as they reach their distal attachments. In other words, the flexor hallucis longus arises laterally, while the flexor digitorum longus arises medially. The amount of flexion is very considerable, but extension is limited by the plantar and

collateral ligament Collateral ligament can refer to: * Lateral collateral ligament (disambiguation): ** Fibular collateral ligament ** Lateral collateral ligament of ankle joint ** Radial collateral ligament of elbow joint * Medial collateral ligament * Collateral li ...

References

Joints Foot {{musculoskeletal-stub

Movements

See also

References