Effect of transcranial direct current stimulation on remediation of inhibitory control on right inferio frontal gyrus in attention deficit and hyperactivity symptoms

Background and Aim: Inhibitory control which is defined as the ability to control the improper responses or behaviors is one of the main components of executive function. Its deficiency in people who have Attention deficit and hyperactive disorder has been shown. The purpose of this study was to improve inhibitory control through transcranial direct current stiFmulation (TDCS) in people with attention deficit and hyperactive disorder syndrome.   Materials and Methods: In this study, 20 technical school students were selected through Wender Utah Rating Scale and CAARS questionnaires which measure attention deficit and hyperactive disorder syndrome in childhood and adulthood as well as SCL-25 questionnaire which measures general psychological health. All the subjects were tested by Stroop and Go-no-Go tests which measure inhibitory control, under anodal stimulation, and sham conditions. Results: The findings show that anodal stimulation on right Inferio Frontal Gyrus increases the accuracy of inhibition in prepotent stimulus inhibition stage significantly. Conclusion: TDCS on right Inferio Frontal Gyrus of the people with attention deficit and hyperactive disorder syndrome can improve the inhibitory control in prepotent stimulus inhibition. Key Words: Transcranial direct current stimulation (TDCS), Inhibitory control, attention deficit and hyperactive disorder