Table 1.

Summary of the r ² values for estimating the mean of each feature as a function of wrist position

		Non-Amputees	Amputees
Muscle Set	Grasp	Mean ± SD	Subject 1	Subject 2
Extrinsics	No Movement	0.898 ± 0.04	0.836	0.836
	Hand Open	0.812 ± 0.04	0.719	0.806
	Key Grip	0.831 ± 0.03	0.755	0.862
	Chuck Grip	0.825 ± 0.05	0.777	0.73
Intrinsics	No Movement	0.913 ± 0.05	0.845	0.847
	Hand Open	0.837 ± 0.07	0.677	0.712
	Key Grip	0.771 ± 0.06	0.743	0.796
	Chuck Grip	0.74 ± 0.07	0.612	0.621
Extrinsics and Intrinsics	No Movement	0.902 ± 0.04	0.839	0.839
	Hand Open	0.819 ± 0.05	0.706	0.777
	Key Grip	0.813 ± 0.03	0.752	0.842
	Chuck Grip	0.799 ± 0.05	0.727	0.697