en پژوهشي Original Research Articles <p style="text-align: justify;"><strong>Objectives:</strong> Autism Spectrum Disorder (ASD) is a group of neurodevelopment syndromes with impairments in social communications and restrictive or repetitive behaviors. Neurofeedback is a new method that may regulate neuro and metabolic function in brain. This study is semi-experimental, with pre and post test.&nbsp;<br> <strong>Methods:</strong> In 26 children with ASD, 40 sessions of Neurofeedback were done. Brain waves were recorded before and after intervention by EEG/ERP 19 channels.&nbsp;<br> <strong>Results:</strong> The average of Theta (low frequency) power decreased, but there was no difference in the Gamma of Gamma waves (High frequency).&nbsp;<br> <strong>Discussion:</strong> Our findings showed that the implementation of Neurofeedback sessions improved Theta, which leads to better social communication.</p> <p></p> Autism Spectrum Disorders (ASD), Neurofeedback, EEG waves 133 138 http://irj.uswr.ac.ir/browse.php?a_code=A-10-13-4&slc_lang=en&sid=1 Sahel Hemmati No Pediatric Neurorehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Roshanak Vameghi r_vamegi@yahoo.com Yes Pediatric Neurorehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Firozeh Sajedi fisajedi@gmail.com No Pediatric Neurorehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Masoud Gharib gharib_masoud@yahoo.com No Pediatric Neurorehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Masoume Pourmohammadreza-Tajrishi Mpmrtajrishi@gmail.com No Pediatric Neurorehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Robab Teymori robab.teymouri@yahoo.com No Pediatric Neurorehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.