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. Author manuscript; available in PMC: 2016 Apr 14.
Published in final edited form as: IEEE Trans Neural Syst Rehabil Eng. 2015 May 6;24(4):485–494. doi: 10.1109/TNSRE.2015.2424371

Fig. 3.

Fig. 3

Confusion matrices showing the error distribution for a partial-hand amputee (PH1, right hand). All classifiers were trained to distinguish between all 19 motion classes of hand and finger motions. (a) Classifier trained with only extrinsic muscle EMG. (b) Classifier trained with only intrinsic muscle EMG. (c) Classifier trained with both intrinsic and extrinsic muscle EMG. The symbols represent the following hand grasps–rest posture (nm), hand open (ho), chuck grip (cg), key grip (kg), power grip (pg), fine pinch grip (fp), tool grip (tg); and finger motions– thumb abduction (ab), adduction (ad), flexion (f1), and extension (e1); index finger flexion (f2) and extension (e2); middle finger flexion (f3) and extension (e3); ring finger flexion (f4) and extension (e4); pinky finger flexion (f5) and extension (e5).