Efficacy and Mechanism of Augmentation of Cognitive Behavioral Therapy With Transcranial Alternating Current Stimulation(tACS) for Obsessive-Compulsive Disorder (OCD)

The investigators recruited outpatient adults with OCD confirmed by the Mini-International Neuropsychiatric Interview (MINI). The following inclusion and exclusion criteria were also applied: Inclusion Criteria: * 18-60 years old * With at least 9 years of education * Y-BOCS score ≥16 * No history of serious medical, neurological illness or other psychotic disorders other than OCD (anxiety or mild to moderate depression secondary to OCD was not exclusionary) * Medication-free or had received stable medication for at least 8 weeks before entering the study and continued the same medication throughout the study Exclusion Criteria: * History of serious medical, neurological illness or other psychotic disorders other than OCD * OCD symptoms are severe, preventing the patient from completing the required assessment and examination * Serious suicide risk * Women who are pregnant or planning to become pregnant * Currently taking antiepileptic medication * Clinically significant physical illnesses or laboratory test abnormalities that have clinical significance * Previous completion of a full course of CBT/ERP treatment