The Distal Interphalangeal Joint (DIPJ) is the terminal joint of a finger. More specifically, it's the joint located closest to the fingertip.
Understanding the DIPJ
Each finger (excluding the thumb, which has only two phalanges) has three phalanges:
- Proximal phalanx: The phalanx closest to the palm of the hand.
- Middle phalanx: The phalanx in the middle of the finger.
- Distal phalanx: The phalanx at the fingertip.
The DIPJ connects the middle phalanx to the distal phalanx, allowing for flexion and extension of the fingertip.
Clinical Significance
The DIPJ is a common site for osteoarthritis, also known as degenerative joint disease. Osteoarthritis in the DIPJ can cause pain, stiffness, and swelling, and can lead to the formation of Heberden's nodes (bony growths) around the joint.
In Summary
The DIPJ is the crucial joint at the fingertip, enabling movement and often affected by conditions like osteoarthritis.
