Hamate

A wrist bone shaped like a hook, contributing to the structure and function of the hand.

The hamate is a carpal bone located on the ulnar side of the wrist, articulating with several other bones of the wrist and hand. It is characterized by its distinctive hook-like projection known as the hamulus, which serves as an attachment site for ligaments and tendons.

Terminologia Anatomica

os hamatum

System

Skeletal system

Function

The hamate plays a crucial role in the overall function of the hand by providing stability and facilitating movement. It is one of the eight carpal bones that form the wrist joint, allowing for versatile motion necessary for grasping, writing, and performing fine motor tasks. Its unique shape aids in the articulation with the fourth and fifth metacarpals, which are important for the grasping function of the hand. Moreover, the hamate provides an anchor for the flexor tendons that control finger movements, contributing to the dexterity and functionality required for everyday activities.

Location

Situated at the base of the palm, the hamate is located at the distal row of the carpal bones, nestled between the triquetrum and the capitate bones. It lies near the wrist's ulnar side, aligning with the ring and little fingers. The hamate's hook extends towards the palm, protruding between the carpal and metacarpal regions, and contributes to the carpal tunnel's formation, through which important nerves and tendons pass.

Did You Know?

The hamate is the only carpal bone that has a hook-like structure, called the hamulus, which provides important muscle attachments.
In some cases, a fracture of the hamate can occur due to repetitive strain or impact, commonly seen in athletes.
The name 'hamate' is derived from the Latin word 'hamatus,' meaning 'hooked,' referring to its distinctive shape.