Progression of language profiles in primary progressive aphasia: A bicentric longitudinal study.
BACKGROUND Primary progressive aphasias (PPA) are syndromes characterised by a progressive loss of language functions. To date, four main variants have been identified: semantic (svPPA), non-fluent/agrammatic (nfvPPA), logopenic (lvPPA) and Primary Progressive Apraxia of Speech (PPAoS). Currently, little is known about...