The biofeedback pointer: EMG control of a two dimensional pointer

The Biofeedback Pointer is a graphic input device controlled by wrist motion. Moving the wrist causes the pointer to move in that direction. The pointer detects the electromyograms of four of the muscles used to move the wrist. These are interpreted by a neural network which is trained for each user. The network takes about half a minute to train. The Biofeedback Pointer was found to perform 14% as well as the mouse in simple pointing tasks, which is about half of the lowest performance of a common graphic input device. Using a more sophisticated neural network or better training may improve the device to a more comparable level.