The mouse is an indespensible tool that enables us to do so much, yet anyone who has used a computer for prolonged periods will tell you they suffer from some form of shoulder, wrist, or arm pains. I compute all day on my T43, and it is no conincidence that my right arm/wrist/shoulder clearly suffers more stress from the usage of the TrackPoint.
The Mouse ATC is a device aimed at improving the ergonomics for computer users. There is a video demo of the unit here. It appears to be a joystick-like construction with a "traditional" mouse sitting atop it — mouse movements are simulated by the pitching and yawing of the device.
Initial testing
indicates that the use of the Mouse ATC reduces the stress on large muscle
groups in the upper and lower arms and shoulder. With more formal testing
yet to come, we are confident that our initial findings will show that use
of the Mouse ATC will provide a more ergonomic solution for Human-Computer
Interfacing. For more information about the Mouse ATC, or about Wolfe
Systems, feel free to visit wolfe-systems.com . To learn more
about Iguana Robotics, Inc., visit iguana-robotics.com.
For more information, please see the forum discussion thread.

