To investigate the effect of transcranial oscillatory direct current stimulation on functions of cerebral cortex (cortical excitability and frequency of eeg) in healthy subjects

Inclusion Criteria:

• Healthy male
• Age ranges from 20 to 30 years old
• No history of neurological or psychiatric diseases, no history of chronic illness
• No positive results were found in the examination of the nervous system
• All right-handed according to Edinburgh Handedness Inventory
• The subjects voluntarily participated in this study and signed an informed consent form

Exclusion Criteria:

• Individuals with severe illnesses
• Previous history of brain surgery or epilepsy
• Individuals who experience changes in physical condition during the experiment
• Individuals with metal implants, such as pacemakers, DBS therapists, stents, etc
• Alcoholics

The participant eligibility is not based on self-representation of gender identity. The investigators apply the gender eligibility to avoid the influence of female's menstrual cycle.