0636 Objective sleep as a predictor of cognitive decline among non-demented elderly: preliminary results from the Cretan Aging Cohort-V45IS1 0636 Objective sleep as a predictor of cognitive decline among non-demented elderly: preliminary results from the Cretan Aging Cohort-V45IS1 Download 0635 Validation of a clinical scale for defining RBD severity in participants of the North American Prodromal Synucleinopathy (NAPS) consortium-V45IS1 0637 Associations between Alzheimer’s Disease Pathology and the Psychomotor Vigilance Task in Cognitively Unimpaired Adults with and without Obstructive Sleep Apnea-V45IS1