The<unk>  are hinge-joints of the phalanges of the<unk> . There are two sets (except in the thumb):
"proximal<unk>  joints" (PIP), those between the first (also called proximal) and second (intermediate) phalanges
"distal<unk>  joints" (DIP), those between the second and third (distal) phalanges
A similar group of articulations also function in the toes.
Interphalangeal articulations of hand
Claw hand
Metatarsophalangeal articulations
Pawpaw
Club foot
Flexor retinaculum of foot
Hinge joint
Range of motion