Many experts in ergonomic science agree that the standard flat computer mouse it not the most healthy of cursor control mechanisms to use. This kind of mouse forces the hand into a "pronated" position, meaning that the palms are parallel to the floor. In his position, the radius and ulna bones are actually twisted and scissored. This pronated position places extra pressure on the Carpal Tunnel nerve and can cause any number of repetitive disorders in the wrist and hand.

Instead of the regular flat mouse, many physical ergonomic advisors recommend the use of a vertical mouse. This kind of mouse keeps the hand perpendicular to the floor with the thumb facing upwards. The wrist is kept parallel to the forearm and hand bones and the fingers are kept relaxed and curved in a non-stressed manner. Most vertical computer mouses have a central base that is calmly grasped by the fingers and light enough to be moved around the mat without a lot of effort.

This mouse type functions exactly like a regular mouse. The movements of the mouse on a special mat are recorded (either through an optical device or a track wheel located beneath the base) and translated to the computer through a wire. The vertical mouse usually has two clickable buttons located on the side of the base, near the finger area, as well as a scroll wheel for easy website and document navigation.

Using the Vertical Mouse with a Corresponding Keyboard

Those who realize the effectiveness of the vertical style of computer mouse often decide to purchase split ergonomic keyboards to keep the hands in an angle during long periods of typing. On the other hand, the vertical mouse can be used in conjunction with flat keyboards as well. However, people who use flat keyboards may have a difficult time adjusting from a vertical mouse to the horizontal typing position and back again. This type of swiveling motion of the arm may become uncomfortable or damaging to the wrist, especially if this action is repeated often throughout the day.