This webinar with a speech by Dr. Andreas Müller, Chairman of the Board of HBimed A Harvard fellow was diagnosed with EEG-based psychiatric disorders. The workshop reviewed the biomarkers of Attention Deficit Hyperactivity Disorder in recording rest and brain activity and used diagnostic indicators in the HBI database (the most up-to-date and comprehensive database for electroencephalography at rest and activity) to increase the accuracy of diagnosis and treatment. In the study of biomarkers of psychiatric disorders, endophenotypes (which include systems and brain functions) have received special attention, and more accurate diagnoses can be made using the knowledge of brain systems and brain functions associated with a disorder. Kropotovo, 2016). Quantitative electroencephalography (QEEG) has been used by the American Psychiatric Electrophysiology Association (APEA) as a tool for clinical use since 1994, and has been used by many neurologists, psychiatrists, and psychologists to examine the brain (Gonckelman, 1999). EEG recording is performed using 19 electrodes based on the 10-20 model on the head. It records computer-recorded signals and processed mathematical formulas, and gives us the state of brain waves in each region in the form of interpretable shapes and graphs. For each of us, brain function is recorded both at rest (open-closed-eye) and in brain activity (performing a thought-provoking task) to get the best picture of brain function in different states. Today, QEEG is a valid and common biomarker for examining the neurophysiological underpinnings of behavior. This method, as a non-invasive and inexpensive method that is easy to implement, is one of the most popular methods for clinical evaluation of neurological and psychological disorders (Hoggs and John, 1999). This includes helping to diagnose a disorder and differentiate it from other disorders, determining the biological subtype of that disorder, determining the appropriate method and personalized treatment protocol for that person, monitoring the effects of treatment, and more accurately prescribing medication. To achieve these goals, it is necessary to compare the brain record of each person with a community of the same age and gender (database). Link to receive workshop slides in the first and second sessions: