The pattern of Hyposmia hemodynamic response, functional connectivity and ERP response was investigated in patients with Parkinson's disease, Multiple System Atrophy (MSA) and Progressive Supranuclear Palsy (PSP). Results revealed the presence of significant olfactory loss correlated with differential pattern in the olfactory pathway including frontal region and temporal areas. MRI, BOLD and EEG, can be used to detect early biomarker(s) for the identification of Parkinson and atypical Parkinsonism patients on the basis of hyposmia.
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