What are the MCP joints?
The metacarpophalangeal joint or MP joint, also known as the first knuckle, is the large joint in the hand where the finger bones meet the hand bones. The MCP joint acts as a hinge joint and is vital during gripping and pinching.
Where is MCP joint located?
The metacarpophalangeal joints (MCP) are a collection of condyloid joints that connect the metacarpus, or palm of the hand, to the fingers. There are five separate metacarpophalangeal joints that connect each metacarpal bone to the corresponding proximal phalanx of each finger.
How many MCP joints are there?
There are five separate MCP joints in each hand and these joints serve as transitions between the palm and the fingers. In layman’s terms, the MCP joints are known as the “knuckles,” and the metacarpal heads are especially prominent dorsally when making a fist.
Why does my MCP joint hurt?
The MCP joint can be affected by arthritis from many different causes. They include but are not limited to: Osteoarthritis, which is routine wear and tear. After an injury, which could include a broken bone where the crack extends into the joint.
What is the 3rd MCP joint?
The capsule of the metacarpophalangeal joint is reinforced on all sides. It extends from the metacarpal neck to the base of the proximal phalanx. Dorsally it is reinforced by the common extensor tendon and volarly by the volar plate and the deep transverse metacarpal ligament (DTML).
What are MCP and PIP joints?
The interphalangeal joints of the hand are the hinge joints between the phalanges of the fingers that provide flexion towards the palm of the hand. The DIP, PIP and MCP joints of the hand: Distal InterPhalangeal. Proximal InterPhalangeal.
Where is the 3rd MCP joint?
It extends from the metacarpal neck to the base of the proximal phalanx. Dorsally it is reinforced by the common extensor tendon and volarly by the volar plate and the deep transverse metacarpal ligament (DTML).
How do MCP joints heal?
Finger MCP joint hyperextension injuries may be treated by gently flexing the proximal phalanx and immobilizing the MCP joint in 30° of flexion for 2-3 weeks. A dorsal extension-block splint protects the healing volar plate while allowing active flexion of the finger.
What is the 1st MCP joint?
The MCP joint of the thumb consists of the articulation between the convex head of the first metacarpal and the concave proximal surface of the proximal phalanx of the thumb (Fig. 7.19). The basic structure of the MCP joint of the thumb is similar to that of the fingers.
What muscle flexes MCP joint?
The extensor pollicis brevis, extensor indicis proprius, extensor digitorum communis, and extensor digiti minimi extend the MCP joints (von Schroeder, 1993). The flexors are the flexor pollicis brevis, lumbricals, interossei, and flexor digiti minimi brevis, assisted by the long flexors.
What is Dip & Pip?
The PIP and DIP joints are hinge joints between proximal and middle phalanges and between the middle and distal phalanges respectively.
What is heberden and Bouchard nodes?
Heberden’s nodes are small bony growths that appear at the finger joint closest to the tip of your finger. Bouchard’s nodes, a similar symptom, appear at the finger’s middle joint. These nodes are symptoms of osteoarthritis of the hands.