Trapezium
Trapezium (Anatomy)
Trapezium (pronounced: truh-PEE-zee-uhm) is a bone located in the wrist of humans and some other animals. It is one of the eight carpal bones and is situated near the base of the thumb.
Etymology
The term "trapezium" comes from the Greek word "trapezion" which means "a small table". This is due to the bone's table-like shape.
Anatomy
The trapezium is located in the distal row of the carpal bones, which are the bones closest to the fingers. It is positioned directly below the thumb and is bordered by the scaphoid bone on its radial side, the trapezoid bone on its ulnar side, and the first metacarpal bone at its distal end.
Function
The trapezium plays a crucial role in the mobility and strength of the thumb. It forms a joint with the first metacarpal bone, known as the carpometacarpal joint of the thumb, which allows for the thumb's wide range of motion.
Related Terms
External links
- Medical encyclopedia article on Trapezium
- Wikipedia's article - Trapezium
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