Induction of cortical plasticity and improved motor performance following unilateral and bilateral transcranial direct current stimulation of the primary motor cortex

Table 1 Mean ± SEM participant characteristics and baseline excitability measures before tDCS

	Sham	Unilateral	Bilateral	P-value
AMT (%)	30.36±	30.36±	29.36±	0.89
AMT (%)	1.71	1.67	1.60	0.89
SI (130% AMT)	39.09±	39.45±	38.38±	0.94
SI (130% AMT)	2.37	2.27	2.16	0.94
SI 1mV (%)	40.09±	38.45±	37.36±	0.76
SI 1mV (%)	2.78	2.56	2.32	0.76
CS (%)	23.00±	23.09±	22.18±	0.86
CS (%)	1.35	1.28	1.26	0.86
M_MAX (mV)	10.09±	10.24±	10.13±	0.99
M_MAX (mV)	1.62	1.61	1.50	0.99
MEP (%M_MAX)	14.80±	14.13±	13.99±	0.98
MEP (%M_MAX)	3.28	3.28	3.36	0.98
SICI ratio	29.66±	28.62±	30.07±	0.93
SICI ratio	2.95	2.71	2.73	0.93
rmsEMG	0.056±	0.060±	0.058±	0.90
(130% AMT)	0.005	0.006	0.006	0.90
VAS	1.29±	1.10±	1.64±	0.25
VAS	0.19	0.22	0.27	0.25
Purdue	56.84±	56.23±	51.04±	0.25
Pegboard	40.80	2.89	3.13	0.069

Values are mean ± SEM. AMT, Active motor threshold; CS, conditioning stimulus; SI stimulation intensity to produce 1mV, M_MAX, maximum, M-wave; VAS, visual analogue scale.

ISSN: 1471-2202