Highly Superior Autobiographical Memory (HSAM): A Systematic Review
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Published:2024-02-23
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Volume:
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ISSN:1040-7308
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Container-title:Neuropsychology Review
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language:en
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Short-container-title:Neuropsychol Rev
Author:
Talbot JessicaORCID, Convertino Gianmarco, De Marco Matteo, Venneri Annalena, Mazzoni Giuliana
Abstract
AbstractIndividuals possessing a Highly Superior Autobiographical Memory (HSAM) demonstrate an exceptional ability to recall their own past, excelling most when dates from their lifetime are used as retrieval cues. Fully understanding how neurocognitive mechanisms support exceptional memory could lead to benefits in areas of healthcare in which memory plays a central role and in legal fields reliant on witnesses’ memories. Predominantly due to the rareness of the phenomenon, existing HSAM literature is highly heterogenous in its methodologies used. Therefore, following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, we performed the first systematic review on this topic, to collate the existing behavioural, neuroanatomical, and functional HSAM data. Results from the 20 experimental selected studies revealed that HSAM is categorised by rapidly retrieved, detailed and accurate autobiographical memories, and appears to avoid the normal aging process. Functional neuroimaging studies showed HSAM retrieval seems characterised by an intense overactivation of the usual autobiographical memory network, including posterior visual areas (e.g., the precuneus). Structural neuroanatomical differences do not appear to characterise HSAM, but altered hippocampal resting-state connectivity was commonly observed. We discuss theories of HSAM in relation to autobiographical encoding, consolidation, and retrieval, and suggest future directions for this research.
Funder
Università degli Studi di Roma La Sapienza
Publisher
Springer Science and Business Media LLC
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