Interphalangeal joint of the hand

Interphalangeal (IP) joints of the hand are hinge type synovial joints between adjacent phalanges. The thumb has a single interphalangeal joint, and the second to fifth digits each have a proximal and a distal interphalangeal joint.

The head of the more proximal phalanx articulates with the base of the more distal phalanx

  • flexion
  • extension
    • limited by the palmar and collateral ligaments

Each joint is enclosed by a fibrous capsule which attaches to the margins of the articular surfaces and is lined by a synovial membrane.

  • two collateral ligaments
    • strengthen the capsule on each side 1, 2
  • palmar ligament (volar ligament)
    • a thick, fibrocartilaginous plate that connects the collateral ligaments and attaches firmly to the base of the more distal phalanx and attaches loosely to the head of the more proximal phalanx1, 2

Deep digital arteries from the superficial palmar arch

Digital nerves from the ulnar and median nerves


Article information

rID: 70058
Section: Anatomy
Tag: pip, dip, ipj
Synonyms or Alternate Spellings:
  • IP articulation - hand
  • Interphalangeal joints - hand
  • Interphalangeal (IP) joint - hand
  • Interphalangeal (IP) joints - hand
  • IPJ - hand
  • IP joint - hand

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