- Abbreviations: AD Alzheimer’s disease, bvFTD Behavioral variant frontotemporal dementia, CBS Corticobasal syndrome, lvPPA Logopenic variant primary progressive aphasia, MSA-C Multiple system atrophy (cerebellar dysfunction subtype), MSA-P Multiple system atrophy (parkinsonian subtype), nfvPPA Nonfluent variant primary progressive aphasia, PD Parkinson’s disease, PSP Progressive supranuclear palsy, svPPA Semantic variant primary progressive aphasia