Table 2.

Stimulation parameters and MEP size (mean ± SD)

	Finger task			Elbow task
	Self-paced	Ballistic	p value	Self-paced	Ballistic	p value
Rest
TS (% MSO)	59.9 ± 10.4			78.6 ± 12.7
CS (% MSO)	61.7 ± 9.3			80.1 ± 13.4
Test MEP (mV)	1.78 ± 0.5			0.46 ± 0.3
MEP elicited by CS (mV)	1.88 ± 1.2			0.12 ± 0.1
Preparatory phase
TS (% MSO)	59.9 ± 10.4			78.6 ± 12.7
CS (% MSO)	61.7 ± 9.3			80.1 ± 13.4
Test MEP (mV)	2.19 ± 1.0	2.22 ± 1.3	0.21	0.57 ± 0.3	0.71 ± 0.3	0.10
MEP elicited by CS (mV)	1.64 ± 1.1	1.70 ± 1.1	0.35	0.18 ± 0.1	0.15 ± 0.1	0.24
Execution phase
Unadjusted
TS (% MSO)	45.5 ± 14.6			70.4 ± 7.3
CS (% MSO)	51.5 ± 10.8			90.9 ± 9.1
Test MEP (mV)	3.00 ± 1.2	5.91 ± 2.9	<0.001	2.02 ± 1.5	6.55 ± 4.2	<0.001
MEP elicited by CS (mV)	1.97 ± 1.0	2.26 ± 1.3	0.35	0.44 ± 0.4	0.44 ± 0.4	0.98
Adjusted
TS (% MSO)		35.8 ± 11.8	0.21		46.1 ± 6.6	<0.001
CS (% MSO)		51.5 ± 10.8			90.9 ± 9.1
Test MEP (mV)		3.15 ± 1.5	0.81		2.48 ± 2.3	0.51
MEP elicited by CS (mV)		1.88 ± 0.9	0.40		0.41 ± 0.4	0.91