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There are several types of alternative ergonomic US keyboards. One is the Split Us keyboard. This type of us keyboard is the best alternative if one wants to reduce the risk of Ulnar Deviation which we mentioned earlier. Ulnar Deviation is one position of the wrist wherein the wrists are being bent to the side, towards the “pinky” or little finger. This is not a neutral position thus contributes to the strain and stress of some muscles. It also increases friction experienced by the tendons, mostly at the area of the thumb. This in turn adds pressure to the nerves that run to the wrists. Split us keyboards have a different key orientation that guides the wrists so that they are straightened out instead of bent sideways. Another alternative type of ergonomic us keyboard is the Tented Us keyboard. This is a bit more sophisticated that the Split Us keyboard. Apart from addressing Ulnar Deviation, it also is made to correct one other issue which is Pronation. This type of posture rotates the hands inwards to the thumbs which twist the forearms in the process. The Tented Us keyboard attempts to amend this kind of posture by letting the arms of the user work at certain angles aimed towards each other. Inventors have made different ergonomic us keyboards to help people maintain their healthy postures. Other helpful types are: Negative Slope Us keyboards, Supportive Us keyboards, and Minimum Motion Us keyboards among others.
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