A Study of tDCS for Swallowing Difficulties in Stroke Patients

Inclusion Criteria * Subjects who have diagnosed as primary stroke by physician's physical exam or radiologic diagnosis * Subjects who have cortical or subcortical brain lesion * Subjects who was diagnosed as stroke within 6 months * Subjects ages from 18years to 80years old * Subjects who have less than 5 points of DOSS score due to swallowing difficulty from CNS injury * Subjects who is possible to receive swallowing function intervention 5 days a week * Subjects who understand the purpose of the study and acquired the consent of the patient or caregiver * Subjects who had no effect from brain stimulation or electrical stimulation therapy Exclusion Criteria * Subjects who have pre-existing and active major neurological disease * Subjects who have pre-existing and active major psychiatric disease, such as major depression, schizophrenia, bipolar disease, or dementia * Subjects who have brain lesion except cortex or subcortex area * Subjects who have any metal component after brain surgery, low threshold to pain, history of seizure * Subjects who is estimated as not appropriate for the study by the investigators