Metacarpals

Metacarpals are the five long bones in the hand located between the wrist and the fingers. They are numbered from one to five, starting from the thumb side of the hand. Each metacarpal consists of a base, a shaft, and a head. The base is the part closest to the wrist, the shaft is the long, slender part, and the head is the rounded end that connects to the fingers.

Structure

The metacarpals are similar in structure to most other long bones in the body. They have a shaft, which is the long, slender part of the bone, a base, which is the part closest to the wrist, and a head, which is the rounded end that connects to the fingers. The base of each metacarpal articulates with the carpal bones of the wrist and the adjacent metacarpals. The head of each metacarpal articulates with the proximal phalanges of the fingers.

Function

The metacarpals play a crucial role in the function of the hand. They provide the structure and support necessary for the hand to function properly. They allow for the movement of the fingers and thumb, and they also play a role in the sensation of touch.

Clinical significance

Injuries to the metacarpals, such as fractures or dislocations, can significantly impair hand function. Treatment for these injuries typically involves immobilization, but in some cases, surgery may be necessary. Conditions such as metacarpal bossing, where there is an overgrowth of the metacarpal head, can also affect the metacarpals.

See also

• Carpal bones
• Phalanges
• Hand

Metacarpals Resources
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