interphalangeal joint

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interphalangeal joint

The doctor points to the interphalangeal joint on a patient's finger.

Definition

Noun: A synovial hinge joint located between two consecutive phalanges (finger bones or toe bones) in a digit. It allows for the flexion and extension of the fingers and toes.

Usage

The term "interphalangeal joint" is a specific anatomical term. It is used to precisely identify the joints of the digits. The joints are further specified as proximal interphalangeal (PIP) joints (between the first and second phalanges) and distal interphalangeal (DIP) joints (between the second and third phalanges). In the thumb and big toe, which have only two phalanges, there is only one interphalangeal (IP) joint.

Examples
  • Arthritis commonly affects the interphalangeal joints, causing swelling and pain.
  • The injury was localized to the proximal interphalangeal joint of her middle finger.
  • He suffered a dislocation of the distal interphalangeal joint on his little toe.
Advanced Usage
  • Medical Context: The term is standard in medical, anatomical, and clinical descriptions (e.g., radiology reports, surgical notes, physical therapy assessments).
  • Abbreviation: Often abbreviated as IP joint (for the single joint in the thumb/big toe), PIP joint, and DIP joint in medical charts and professional communication.
Variants and Related Words
  • IP joint: The interphalangeal joint of the thumb or great toe.
  • PIP joint (Proximal Interphalangeal Joint): The interphalangeal joint closest to the hand or foot.
  • DIP joint (Distal Interphalangeal Joint): The interphalangeal joint closest to the tip of the finger or toe.
  • Phalangeal: (Adjective) Relating to a phalanx (finger/toe bone).
  • Metacarpophalangeal joint (MCP): The joint between a metacarpal bone and a phalanx (knuckle).
  • Metatarsophalangeal joint (MTP): The joint between a metatarsal bone and a phalanx.
Synonyms
  • Digital joint (a less specific, general term).
  • Phalangeal joint (a less common but accurate synonym).
Related Phrases / Idioms
  • No direct idioms exist for this specific anatomical term. It is not used in figurative language.
interphalangeal joint

The doctor points to the interphalangeal joint on a patient's finger.

Noun
  1. any of the joints between the phalanges of the fingers or toes