Fourth metacarpal bone

The fourth metacarpal bone (highlighted in green)

The Fourth Metacarpal Bone is one of the five metacarpal bones in the human hand. It is located in the center of the hand, between the third metacarpal bone and the fifth metacarpal bone.

Structure

The fourth metacarpal bone, like all metacarpal bones, consists of a base, a shaft, and a head. The base is the part of the bone that connects to the carpal bones in the wrist. The shaft is the long, straight part of the bone, and the head is the rounded end that connects to the proximal phalanges of the fingers.

Function

The fourth metacarpal bone plays a crucial role in hand function. It provides structural support and allows for a wide range of movements, including flexion, extension, abduction, and adduction. It also plays a role in the complex movements of opposition and reposition.

Clinical Significance

Fractures of the fourth metacarpal bone, also known as "boxer's fractures," are common and often occur as a result of direct trauma to the hand. Treatment typically involves immobilization with a cast or splint, but surgery may be required in severe cases.

See Also

• Metacarpal bones
• Hand anatomy
• Boxer's fracture