
The vertical mouse helps prevent such injuries while reducing strain on your forearm.

In addition, this pronated position causes some users to drag the mouse using the wrist only, which increases pressure in the carpal tunnel and leads to the development of the syndrome. The vertical mouse has been invented to prevent the pronation of the arm and the wrist as it causes the joint space between the two forearm bones to tighten. However, when using the standard flat mouse, it is difficult to achieve this natural position as the forearm rotates to allow the palm to rest on the surface a position known as pronation. The natural resting position of the forearm and the wrist is thumbs-up. Anker 2.4G Wireless Vertical Ergonomic Optical Mouse
