Electrophysiological Correlates of inhibitory processing of ADHD

Background and Aim ADHD is a most prevalent neurodevelopmental disorder of childhood. Behavioral disinhibition is one of the main common features of the disorder. It was proposed that some brain structures play an important role in behavioral, cognitive and emotional problems of ADHD. QEEG is one of the most frequent and acceptable tools in studying the cortical functions. Researches revealed that there are significant differences of ADHDs and healthy children. Most of the evidences that follow the electrical functions of cortex in children with during specific cognitive tasks. Methods: QEEG recording was performed on ۴۰ ADHD children in eyes closed, open eyes in resting state, open eyes during task and eyes open immediately after task. Then, the relative power and power ratios of different bands were recorded in recorded QEEGs and task responses were statistically analyzed. Results: the purpose of the study was to correlate QEEG neurophysiological indices spatially relative power and power ratio in different regions of brain with inhibition functions during the GoNoGo task. Conclusion: relative power and power ratio are different during rest, task and after that, and a delayed excitation was observed by Alpha waves after task. And significant relationship was observed in different brain bands in all physiological indices with attention deficit and disinhibiting indices.

کلیدواژه ها:

ADHD ، QEEG ، Power ratio ، Relative Power