Inclusion Criteria:  ≥ 18 years of age with. diagnosis of idiopathic Parkinson's disease according to the updated diagnostic criteria (Postuma 2015) or (3) Diagnosis of a possible or probable Multiple System Atrophy according to the diagnostic criteria (Gilman 2008) or (4) Diagnosis of a possible or probable progressive supranuclear gaze palsy according to the diagnostic criteria (Höglinger 2017) (5) in Hoehn and Yahr stages I-V.  Exclusion Criteria:  Patients that do not sign the informed consent form Patients who have contraindications for a fiberendoscopic swallowing examination Patients who have contraindications to the two weeks of EMST training (e.g., severe pulmonary disease, severe dementia). Patients who have competing causes of dysphagia (e.g., history of stroke, tumor in the neck).