Different Current Intensities of Anodal Transcranial Direct Current Stimulation Do Not Differentially Modulate Motor Cortex Plasticity

Table 2

Mean ± SE cortical excitability and short-interval intracortical inhibition (SICI) responses following anodal tDCS: MEP amplitude at 120% AMT as a percentage (% of 𝑀_MAX), and conditioned MEP amplitudes as a percentage of the test response (SICI ratio).

tDCS condition	Baseline	Post	15 min post	30 min post
MEP amplitude at 120% AMT (% of 𝑀MAX)
0.8 mA	10.1 ± 3.0	13.5 ± 3.8	13.2 ± 3.8	12.2 ± 3.1
1.0 mA	10.8 ± 3.1	15.3 ± 4.3	15.3 ± 4.5	14.5 ± 3.9
1.2 mA	9.8 ± 3.17	11.5 ± 2.1	11.4 ± 2.8	13.4 ± 3.3
SICI (% of test response)
0.8 mA	48.9 ± 6.2	63.5 ± 9.1	62.6 ± 8.2	62.7 ± 7.7
1.0 mA	50.9 ± 6.1	65.9 ± 6.2	60.1 ± 11.6	57.4 ± 7.7
1.2 mA	47.5 ± 6.5	53.9 ± 6.7	63.1 ± 6.1	53.5 ± 6.4