Table 1.

Stimulus conditions

Condition	CS100	CCS12	CS3	TS
A	—	—	—	1mV
B	—	—	0.9 AMT	1mV
C	—	1.3 RMT	—	1mV
D	1 mV	—	—	1mV
E	—	—	—	1mVCCS12
F	—	—	0.9 AMT	1mVCCS12
G	—	1.3 RMT	—	1mVCCS12
H	—	1.3 RMT	0.9 AMT	1mVCCS12
I	—	—	—	1mVCS100
J	—	—	0.9 AMT	1mVCS100
K	—	1.3 RMT	—	1mVCS100
L	1 mV	—	—	1mVCS100
M	1 mV	—	0.9 AMT	1mVCS100
N	1 mV	1.3 RMT	—	1mVCS100

CS₁₀₀, ipsilateral conditioning stimulus delivered 100 ms before test stimulus (TS) over the left hemisphere; CCS₁₂, contralateral conditioning stimulus delivered 12 ms before TS; CS₃, ipsilateral conditioning stimulus delivered 3 ms before TS; RMT, resting motor threshold; AMT, active motor threshold. See Methods for TS intensity nomenclature.