Figure 8.

Qualitative perfromance evaluation in Myoelectric control task. The subject controlled simultaneously both dimensions of a cursor with his EMG. He had the task to steer the cursor into the randomly appearing circles and remain there for one second. The linear control model was trained on the first day before run 1. Sucessfully hit targets are shown in green, missed targets in red and targets that where entered but not hit due to insufficient dwell time are shown in orange. The black curve indicates the trace of the cursor. While the performace drops on the second day for both surface electrode types, it remains stable for the implants even across days without retraining the model.