Table 1.

Mean (SE) and [95% confidence interval] for nonconditioned and conditioned MEPs, SICI, and background FDS EMG levels in Study 1 (A) and Study 2 (B). The mean SICI was calculated from individual subjects’ SICI values, not the mean MEP amplitudes shown in the table.

(a) Study 1
	Voluntary relaxation			Sustained contraction
	70%	80%	90%	70%	80%	90%
Nonconditioned MEP (mV)	1.9 (0.2) [1.4, 2.4]	1.5 (0.3) [0.9, 2.2]	1.5 (0.3) [0.9, 2.0]	2.1 (0.3) [1.5, 2.7]	1.8 (0.2) [1.3, 2.3]	1.6 (0.2) [1.2, 2.0]
Conditioned MEP (mV)	1.3 (0.2) [0.9, 1.6]	1.0 (0.2) [0.5, 1.4]	0.9 (0.1) [0.6, 1.2]	1.5 (0.2) [1.1, 1.9]	1.3 (0.1) [1.0, 1.5]	1.1 (0.1) [0.9, 1.4]
SICI (%)	34.5 (5.8) [21.6, 47.3]	34.1 (5.0) [23.0. 45.2]	34.3 (4.1) [25.1, 43.3]	23.7 (5.3) [11.9, 35.5]	25.2 (5.2) [13.6, 36.8]	24.0 (4.8) [12.4, 34.7]
Background FDS EMG (% MVC)	24.4 (3.1) [14.7, 34.2]	13.4 (1.5) [8.7, 18.1]	8.1 (1.0) [4.9, 11.3]	24.3 (2.4) [16.6, 32.1]	16.8 (1.2) [12.9, 20.7]	13.1 (1.0) [10.0, 16.1]

(b) Study 2
	Maximum power grip	Voluntary relaxation			Sustained contraction			Rest
		25%	50%	75%	25%	50%	75%
Nonconditioned MEP (mV)	3.6 (0.5) [2.5, 4.8]	3.2 (0.4) [2.3, 4.2]	2.7 (0.4) [1.8, 3.7]	1.9 (0.3) [1.2, 2.7]	3.6 (0.6) [2.2, 5.0]	2.7 (0.6) [1.4, 4.1]	1.7 (0.2) [1.2, 2.3]	1.0 (0.2) [0.6, 1.4]
Conditioned MEP (mV)	3.3 (0.5) [2.3, 4.5]	2.3 (0.4) [1.3, 3.2]	1.7 (0.3) [1.0, 2.3]	0.7 (0.2) [0.4, 1.1.]	3.1 (0.6) [1.7, 4.5]	1.9 (0.5) [0.7, 3.1]	0.8 (0.2) [0.4, 1.3]	0.3 (0.1) [0.2, 0.4]
SICI (%)	7.9 (3.5) [0.3, 15.6]	29.9 (7.1) [14.4, 45.5]	40.6 (6.3) [26.8, 54.4]	57.3 (6.9) [42.0, 72.6]	16.1 (5.8) [3.3, 29.0]	31.7 (7.8) [14.5, 48.8]	49.1 (8.6) [30.2, 68.8]	56.3 (7.9) [39.0, 73.6]
Background FDS EMG (% MVC)	104.2 (6.0) [93.3, 118.9]	68.7 (9.2) [48.5, 88.9]	37.7 (8.8) [18.5, 56.9]	13.2 (5.8) [0.5, 25.9]	66.9 (9.0) [47.1, 86.7]	36.6 (8.5) [17.9, 55.3]	12.8 (5.2) [1.2, 24.5]	3.8 (0.6) [2.5, 5.0]