Interphalangeal joint of the foot

The interphalangeal joints of the foot are the articulations between adjacent phalanges 1. Each foot has nine interphalangeal joints. The hallux has one interphalangeal joint whilst the lesser digits each have a proximal and a distal interphalangeal joint.

Gross anatomy

The joint is formed by the articulation between the head of a phalanx with the base of the phalanx located distally 1. The joint is stabilized by a pair of collateral ligaments and an articular capsule 1. The joint is a hinge joint and allows for flexion and extension of the phalanges 1.

Related pathology

Erosions of the margins of the interphalangeal joint of the hallux and distal interphalangeal joint of the lesser digits can occur in psoriatic arthritis 2. In rheumatoid arthritis, erosions of the medial aspect of the interphalangeal joint of the hallux is a common finding 2.

Anatomy: Lower limb
Share article

Article information

rID: 59893
Section: Anatomy
Tag: refs, cases
Synonyms or Alternate Spellings:
  • Proximal interphalangeal joint (PIP) of the feet
  • Distal interphalangeal joint (DIP) of the feet
  • Interphalangeal joints (IP) of the feet
  • Proximal interphalangeal joint of the feet
  • Distal interphalangeal joint of the feet
  • Distal interphalangeal joint of the toe
  • Distal interphalangeal joints of the toe
  • Interphalangeal joints (IP) of the toe
  • Interphalangeal joints (IP) of the toes
  • Proximal interphalangeal joint of the toe
  • Proximal interphalangeal joint of the toes

Support Radiopaedia and see fewer ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.