Interphalangeal articulations of foot

Interphalangeal joints of foot
Bones of the right foot, plantar (bottom) surface (Joint not labeled but region is visible)
Details
Identifiers
Latin	articulationes interphalangeae pedis
TA	A03.6.10.901
FMA	71357
Anatomical terminology []

The interphalangeal joints of the foot are between the phalanges (bones) of the toes. They are ginglymoid (hinge) joints, and each has a plantar (underside) 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.

The only movements permitted in the joints of the digits are flexion and extension; 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 ligaments.

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)