Brain activation in highly superior autobiographical memory: the role of the precuneus in the autobiographical memory retrieval network
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Authors
Mazzoni, GiulianaClark, Andrew
De Bartolo, Adriana
Guerrini, Chiara
Nahouli, Zacharia
Duzzi, Davide
De Marco, Matteo
McGeown, William
Venneri, Annalena
Affiliation
University La SapienzaUniversity of Hull
University of Bedfordshire
University of Westminster
Universita' di Modena e Reggio Emilia
University of Sheffield
University of Strathclyde
Issue Date
2019-03-05Subjects
autobiographical memory networkbrain imaging
highly superior autobiographical memory (HSAM)
praecuneus
memory
C860 Neuropsychology
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This is the first study to examine functional brain activation in a single case of Highly Superior Autobiographical Memory (HSAM) who shows no sign of obsessive compulsive disorder (OCD). While previous work has documented the existence of HSAM, information about brain areas involved in this exceptional form of memory for personal events relies on structural and resting state connectivity data, with mixed results so far. In this first taskbased functional magnetic resonance Imaging (fMRI) study of a normal individual with HSAM, dates were presented as cues and two phases were assessed during memory retrieval, initial access and later elaboration. Results showed that initial access was very fast, did not activate the hippocampus, and involved activation of predominantly posterior visual areas, including the praecuneus. These areas typically become active during later stages of elaboration of personal memories rather than during initial access. Elaboration involved a balanced bilateral activation of most of the autobiographical network areas, rather than the more typical shifts observed in people without HSAM. Overall, the pattern of brain activations, which rests on repeated observations in a single individual, highlights a strong involvement of the praecuneus and an idiosyncratic initial access to personal memory representations. Implications for the nature of personal memories in HSAM are discussed.Citation
Mazzoni G, Clark A, De Bartolo A, Guerrini C, Nahouli Z, Duzzi D, De Marco M, McGeown W, Venneri A (2019) 'Brain activation in highly superior autobiographical memory: the role of the precuneus in the autobiographical memory retrieval network', Cortex, 120 (), pp.588-602.Publisher
ElsevierJournal
CortexPubMed ID
30926140Additional Links
https://www.sciencedirect.com/science/article/pii/S0010945219300887Type
ArticleLanguage
enISSN
0010-9452ae974a485f413a2113503eed53cd6c53
10.1016/j.cortex.2019.02.020
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