Phonemic restoration in Alzheimer's disease and semantic dementia: a preliminary investigation.

ABSTRACT: Phonemic restoration-perceiving speech sounds that are actually missing-is a fundamental perceptual process that 'repairs' interrupted spoken messages during noisy everyday listening. As a dynamic, integrative process, phonemic restoration is potentially affected by neurodegenerative pathologies, but this has not been clarified. Here, we studied this phenomenon in 5 patients with typical Alzheimer's disease and 4 patients with semantic dementia, relative to 22 age-matched healthy controls. Participants heard isolated sounds, spoken real words and pseudowords in which noise bursts either overlaid a consonant or replaced it; a tendency to hear replaced (missing) speech sounds as present signified phonemic restoration. All groups perceived isolated noises normally and showed phonemic restorat

SUBMITTER: Jiang J 

PROVIDER: S-EPMC9123842 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature