Second metacarpal bone

Second Metacarpal Bone

The second metacarpal bone is one of the five metacarpal bones in the human hand. It is the longest of the metacarpal bones and is located in the center of the hand. It articulates proximally with the trapezoid bone and the capitate bone, and distally with the second proximal phalanx.

Structure

The second metacarpal bone is distinguished by its length, being the longest of the metacarpal bones. It is also unique in that it articulates with two carpal bones at its base, the trapezoid and the capitate. The base is quadrilateral and the shaft is prismoid in form. The head of the second metacarpal bone is larger than the heads of the other metacarpal bones.

Function

The second metacarpal bone, like the other metacarpal bones, serves as a connection between the carpus and the phalanges. It plays a crucial role in the flexibility and function of the hand.

Clinical significance

Injuries to the second metacarpal bone can occur as a result of direct trauma or from stress fractures. Treatment typically involves immobilization and, in severe cases, surgery may be required.

Etymology

The term "metacarpal" comes from the Greek words "meta," meaning after, and "carpus," meaning wrist. This reflects the position of the metacarpal bones in the hand, which are located after the wrist bones.

See also

• Metacarpus
• Hand
• Carpus
• Phalanges of the hand

References

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  Second metacarpal bone (left hand) - animation 01
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  Second metacarpal bone (left hand) - animation 02
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  Gray219 - Second metacarpal bone
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  Gray220 - Second metacarpal bone
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