Single-center Study of Gustation in Idiopathic Parkinson's Disease and Lewy Body Disease Using Gustatory Evoked Potential Analysis

metabolic assays determination of food intake hormones oxidative stress and neurodegeneration marker assays

socio-demographic data, medical and family history, treatment taken

MDS-UPDRS scale PART III

MoCA and MMSE scales

anthropometric data (weight, height, BMI, waist circumference, hip circumference, android/gynoid ratio, triceps skin fold, brachial circumference), bioelectrical impedancemetry (fat mass, lean mass, water mass and bone mass)

Recording of PEGs in response to a sucrose solution and a free fatty acid solution (prepared beforehand)