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  • Title: Everyday Memory Disturbance in Primary Progressive Aphasia.
    Author: Foxe D, Ainkaran G, Carrick J, Cheung SC, Ahmed RM, Narasimhan M, Burrell JR, Hwang YT, Irish M, Piguet O.
    Journal: Eur Neurol; 2024; 87(4):177-187. PubMed ID: 39154633.
    Abstract:
    INTRODUCTION: Mounting evidence indicates distinct memory profiles among the primary progressive aphasia (PPA) variants. Neuropsychological tests reveal disproportionate memory impairments in the logopenic variant PPA (lv-PPA) relative to the non-fluent variant PPA (nfv-PPA) and semantic variant PPA (sv-PPA). The real-world experience of day-to-day memory disturbances in PPA, however, remains poorly understood. METHODS: Everyday expressions of memory in 26 lv-PPA, 24 nfv-PPA, and 40 sv-PPA patients, and 70 healthy controls were examined using the Cambridge Behavioural Inventory-Revised (CBI-R) carer questionnaire. Kruskal-Wallis tests compared CBI-R Memory items (1-8) across groups. Receiver operating characteristic curves evaluated the most discriminative items to distinguish lv-PPA from nfv-PPA. RESULTS: Compared to controls, lv-PPA and sv-PPA patients were reported to experience more day-to-day memory issues (item 1), increased repetition of questions (2), forgetting the names of familiar people and objects (4, 5), and poor concentration (6). lv-PPA patients were also reported to exhibit more occurrences of losing or misplacing items (3) and forgetting the day (7). All PPA groups experienced more confusion in unfamiliar environments (8) than controls. Direct comparisons among PPA groups revealed distinct profiles, with lv-PPA and sv-PPA patients exhibiting more frequent forgetting of names and objects (3, 4) than nfv-PPA, and sv-PPA demonstrating greater day-to-day memory impairment (1), repeated questions (2), and poor concentration (6) compared to nfv-PPA. Forgetting the names of familiar objects (5) was the most sensitive and specific item to distinguish lv-PPA from nfv-PPA. CONCLUSIONS: Our findings demonstrate distinct day-to-day memory profiles in PPA. Future research should explore the influence of language impairments on these profiles.
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