The Short-Term Effects of Transcranial Direct Current Stimulation on Electroencephalography in Children with Autism: A Randomized Crossover Controlled Trial

Figure 2

Power spectrum density at baseline relative to immediately after stimulation and 24 hours after stimulation for the two treatment conditions. (a) In the active condition, the results show significant increases in peak alpha frequency (PAF) between baseline (black dashed line) and immediately after stimulation (blue line) (). Significant increases in PAF from baseline were also found at 24 hours after stimulation (). (b) In the sham condition, no significant changes in PAF were found at either assessment point. Significant differences following active treatment, relative to baseline, are indicated by ; . Significant differences following sham treatment, relative to baseline, are indicated by ; .

(a) Active condition

(b) Sham condition