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Open Access 23-02-2024 | Review

Highly Superior Autobiographical Memory (HSAM): A Systematic Review

Authors: Jessica Talbot, Gianmarco Convertino, Matteo De Marco, Annalena Venneri, Giuliana Mazzoni

Published in: Neuropsychology Review

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Abstract

Individuals 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.
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Footnotes
1
Readers should note that when occupations are not described within the articles, this does not necessarily mean a HSAM participant is unemployed. News articles on the topic of hyperthymesia have reported that HSAM individuals work in an array of professions, including a professional violinist, radio news anchor and an actress (Stahl, 2014).
Stahl, L. (2014). The gift of endless memory. CBS News. https://​www.​cbsnews.​com/​news/​the-gift-of-endless-memory/​
 
2
Listen to Correa & Nath (2022) for Podcast anecdotal evidence from a HSAM participant about exercising their own memory.
Correa, D., & Nath, A. (Host). (2022-present). Marilu Henner and the Mysteries of Memory [Audio podcast episode]. Brain & Life podcast. Brain & Life. https://​www.​brainandlife.​org/​podcast/​marilu-henner-and-the-mysteries-of-memory
 
3
Rodriguez McRobbie, L. (2017). Total recall: the people who never forget. The Guardian. Retrieved August 7, 2023, from https://​www.​theguardian.​com/​science/​2017/​feb/​08/​total-recall-the-people-who-never-forget.
 
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Metadata
Title
Highly Superior Autobiographical Memory (HSAM): A Systematic Review
Authors
Jessica Talbot
Gianmarco Convertino
Matteo De Marco
Annalena Venneri
Giuliana Mazzoni
Publication date
23-02-2024
Publisher
Springer US
Published in
Neuropsychology Review
Print ISSN: 1040-7308
Electronic ISSN: 1573-6660
DOI
https://doi.org/10.1007/s11065-024-09632-8