Trapezium bone

Trapezium Bone

The trapezium bone is one of the eight carpal bones of the hand. It is located in the distal row of the carpal bones, adjacent to the metacarpal bone of the thumb. The trapezium bone is distinguished by a deep groove on its anterior surface. It is the radial border of the carpal tunnel.

Structure

The trapezium bone is irregular in shape, but four-sided, and is therefore named after the geometric figure, the trapezium. It is located between the scaphoid bone and the first metacarpal bone. The trapezium is responsible for the mobility and strength of the thumb.

Function

The trapezium bone plays a crucial role in the functioning of the thumb, particularly in its ability to oppose the other fingers. This opposition allows the hand to perform a variety of complex tasks, such as gripping and manipulating objects.

Clinical Significance

Injuries to the trapezium bone, such as fractures or dislocations, can significantly impair hand function. Conditions such as osteoarthritis can also affect the trapezium, causing pain and limiting movement.

See Also

• Carpal bones
• Hand
• Thumb
• Osteoarthritis