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Hand and Wrist Anatomy

Metacarpals 


The five metacarpals are the bones of the hand that form the concave palmar aspect of the hand. They articulate with four of the carpal bones of the wrist and terminate with the phalanges (fingers) to form the MCP joints (knuckles) of the hand.

Categorized by their location, fractures of metacarpals 2 through 5 are subdivided into fractures of the base, shaft, head or neck. They may also be defined by the type of fracture. Fractures of the metacarpals are typically found in the head or neck of the bone as seen with boxer’s fractures which involve the 4th and 5th metacarpals. Fractures of the first metacarpal of the thumb are categorized differently due to the distinctive anatomy of the thumb.
Hand and Wrist Anatomy - Metacarpals

 


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Metacarpal

The five metacarpals are bones that form concave palmar aspect of the hand. They articulate with four of the carpal bones of the wrist. They terminate with the phalanges (fingers) to form the MCP joints (knuckles) of the hand.

metacarpal phalangeal, phalange