Dr. Nahas's scientific interests lie in translational research of mood dysregulation and depressive disorders. His unique expertise is in functional neuroimaging and brain stimulation across various modalities [Transcranial Magnetic Stimulation (TMS), Vagus Nerve Stimulation (VNS), Epidural prefrontal Cortical Stimulation (EpCS), Deep Brain Stimulation (DBS), Electroconvulsive Therapy (ECT) and Focally Electrically Administered Seizure Therapy (FEAST)]. He has also conducted basic research and collaborated on health economic studies. He received funding from various sources, notably the National Institute of Mental Health, National Alliance for Research in Schizophrenia and Depression (NARSAD) and the Hope for Depression Research Foundation (HDRF).