TABLE I.

Mean and standard deviation of d1 and d2 values for AD across the 5 trials of experiment I. t_EMG was automatically calculated with the single-threshold algorithm described in section III with parameters M = 100, and P = 120. Note the different behavior of the muscle across different subjects. Negative values indicate that the EMG onset occurs before the instant that υ exceeds the speed threshold. positive values, especially if high suggest that muscle action was not related to movement; other muscles, either external (e.g., trunk muscles) or internal to the subset recorded for the subject, could have generated the movement (see text)

α	Subject	d1vy(s)	d2vy(s)	d1vt(s)	d2vt(s)
α = 1	Subj. 1	0.079 ± 0.117	−0.064 ± 0.129	0.081 ± 0.116	−0.060 ± 0.130
	Subj. 2	−0.133 ± 0.228	−0.175 ± 0.224	−0.066 ± 0.270	−0.172 ± 0.222
	Pat. 1	0.419 ± 2.999	−1.506 ± 2.426	0.420 ± 2.898	−1.499 ± 2.430
	Pat. 2	−0.270 ± 0.316	−0.371 ± 0.327	−0.265 ± 0.317	−0.360 ± 0.331
α = 3	Subj. 1	0.113 ± 0.105	−0.031 ± 0.125	0.115 ± 0.104	−0.026 ± 0.126
	Subj. 2	−0.009 ± 0.030	−0.052 ± 0.025	0.057 ± 0.105	−0.049 ± 0.023
	Pat. 1	3.629 ± 3.646	1.703 ± 1.936	3.630 ± 3.645	1.710 ± 1.942
	Pat. 2	0.136 ± 0.199	0.035 ± 0.218	0.141 ± 0.199	0.046 ± 0.221