[ABSTRACT] Disorder and attention deficit hyperactivity disorder (ADHD) is a highly prevalent psychiatric disorder in the adolescent population, with significant impact on the adult life of these patients. Objective: The study aims to provide an overview of ADHD in the age group of adolescence and the usefulness of the neurophysiological studies for this condition. Method: We evaluated 59 patients aged 13 years and under 19 years diagnosed with ADHD according to DSM-IV criteria. Patients underwe