Comparison of MEPs amplitude in 12 subjects within a session.

<p>a) ECR, and b) FDI muscles with 5, 10 and 15 MEPs per block in three time points.</p

Contours plot of the ECR and FDI M1 representations.

<p>The overlap between the two representations is shown in green. Cz: The position of vertex. Adapted with modification from Devanne et al. (2006) study <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0047582#pone.0047582-Devanne1" target="_blank">[32]</a>.</p

Percentage increase in corticospinal excitability after the intervention.

<p>The asterisks mark significant differences between ECR muscle MEP amplitudes after the end of a-tDCS in all time points of T0, T10, T20 and T30. Error bars represent SEM.</p

Mean, standard deviation and level of agreement of MEPs latency for three blocks of trials recorded from ECR and FDI muscles.

<p>Mean, standard deviation and level of agreement of MEPs latency for three blocks of trials recorded from ECR and FDI muscles.</p

Comparison of MEPs amplitude in 12 subjects between two sessions.

<p>a) ECR and b) FDI muscle with 5, 10 and 15 MEPs per block in three time points.</p

Comparison of between MEPs correlation of the recorded MEPs latency from ECR and FDI muscles.

<p>Largest ICCs values of each comparison are in bold. ECR: extensor carpi radialis; FDI: first dorsal interosseus; ICCs: inter class correlations; SEM: standard error of measurement.</p

Mean, standard deviation and level of agreement of MEPs amplitude for three blocks of trials recorded from ECR and FDI muscles.

<p>Mean, standard deviation and level of agreement of MEPs amplitude for three blocks of trials recorded from ECR and FDI muscles.</p

The effects of different CDs on the MEPs size over the 30 minutes.

<p>Filled symbols indicate significant deviation of the post-a-tDCS MEP amplitudes compared to baseline (A, B). The asterisks mark significant differences between time points during the 30 minutes after cessation of a-tDCS (B). The only significant differences were seen within D2 condition. Error bars represent SEM.</p

Sensations under the anode reported by participants.

<p>The values are showed as percentage followed by number of subjects in parentheses.</p

Forest plots of sensory threshold changes in healthy individuals.

<p>mparison of percentages of sensory threshold changes before and after c-tDCS (A), and comparison of after effects of sensory threshold changes between active and sham c-tDCS (B). Subgroup analysis: studies of M1 and S1 stimulation. ■ = the effect size for one trial; horizontal line = 95% of confidence interval; ◆ = pooled effect size for all trials. CI: confidence interval, IV: inverse variance.</p