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Use of single-electrode EEG in the evaluation of attention-deficit/hyperactivity disorder
INTRODUCTION. Attention deficit/hyperactivity disorder (ADHD) maintains a diagnosis based on behavioral data despite its involvement in neuropsychophysiological models. The monopolar electroencephalography (EEG) record focused on differentiating children with ADHD versus controls based on a higher theta/beta ratio has been proposed as an alternative to objectify the diagnosis and guide neurofeedback-based intervention, but its results have been controversial.
AIM. To analyze the viability of a single electrode to detect differences in the main cerebral rhythms and especially in theta/beta ratio, in children diagnosed with ADHD, analyzing the differences by subtype, age, sex and type of experimental task.
PATIENTS AND METHODS. 92 children (range: 7-13 years) diagnosed with ADHD were evaluated in a monopolar EEG record on four experimental tasks (rest, reading, active listening and copying a figure). Seven measures on slow and fast EEG rhythms were obtained, plus theta/beta ratio.