Typing and posture [simple functional anatomy]
It has been alleged that typing is best done using a "bionic" prosthesis using an "extended finger". So I repost this observation [see post dating back to December 2009].
A high-tech iLimb with finger extended does not at all appear to be relaxing for shoulder and elbow as for each type, shoulder abduction and elbow elevation are required to move prosthetic index finger into position:
In comparison, a body powered hook or using a pen in conjunction with a prosthetic hand can be far more natural for body posture when typing: