The large polygonal bone (os multangulum majus) is a large bone that is located on the human hand and plays an important role in the movement of the fingers. This bone is polygonal in shape and consists of several parts that allow the fingers to bend and extend.
The polygonal bone is located on the back of the hand and is located between the thumb and metacarpal bone. It consists of two parts: the scaphoid bone and the trapezoid bone. The scaphoid bone is the largest part of the polygonal bone and is shaped like a trapezoid. The trapezoid bone is located on the lateral side of the polygonal bone and also has the shape of a trapezoid, but is smaller.
The movement of the polygonal bone occurs due to its connection with other bones of the hand. When the thumb flexes, the trapezius bone slides over the scaphoid bone, allowing the thumb to bend. When the thumb is extended, the scaphoid bone slides along the trapezius bone, allowing the thumb to extend. In addition, the polygonal major bone also plays a role in maintaining the shape of the hand and stabilizing the position of the thumb.
However, in some cases, the polygonal bone may be damaged or have developmental abnormalities. This can lead to problems with finger movement and even loss of sensation and pain in the area. Therefore, it is important to monitor the health of the polygonal bone and consult a doctor if there are any problems.