Fig. 2

Absolute electroencephalogram (EEG) powers in unstable and stable group and their difference mappings. The absolute EEG powers in corresponding frequency bands, i.e. a beta, b alpha, c theta and d delta were log-transformed. Unstable refers to adult attention-deficit/hyperactivity disorder (ADHD) patients having an arousal stability score below median (= 6), while stable indicates adult ADHD patients having arousal stability score above the median. The data is shown as the mean ± 1 standard error. Brain maps (p-value) showing statistical difference between unstable and stable group. ADHD patients in stable group had significantly reduced absolute delta and theta power at all mentioned regions as compared to those in the unstable group. F frontal site, C central site, P parietal site, O occipital site