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  Long-term memory formation for voices during sleep in three-month-old infants

Bastian, L., Kurz, E.-M., Näher, T., Zinke, K., Friedrich, M., & Born, J. (2024). Long-term memory formation for voices during sleep in three-month-old infants. Neurobiology of Learning and Memory, 215: 107987. doi:10.1016/j.nlm.2024.107987.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0010-7C14-D Version Permalink: https://hdl.handle.net/21.11116/0000-0010-7C15-C
Genre: Journal Article

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2024
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© 2024 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license.
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http://creativecommons.org/licenses/by/4.0/

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https://www.sciencedirect.com/science/article/pii/S1074742724000984 (Publisher version)
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 Creators:
Bastian, Lisa, Author
Kurz, Eva-Maria, Author
Näher, Tim1, 2, Author
Zinke, Katharina, Author
Friedrich, Manuela, Author
Born, Jan, Author
Affiliations:
1Ernst Strüngmann Institute (ESI) for Neuroscience in Cooperation with Max Planck Society, Max Planck Society, Deutschordenstr. 46, 60528 Frankfurt, DE, ou_2074314              
2Fries Lab, Ernst Strüngmann Institute (ESI) for Neuroscience in Cooperation with Max Planck Society, Max Planck Society, Deutschordenstraße 46, 60528 Frankfurt, DE, ou_3381216              

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Free keywords: Event related potential (ERP) Early infancy Long-term memory Mismatch response (MMR) Sleep
 Abstract: Highlights

• Long-term memories are already formed at the age of three months.
• Recall of these memories activate a frontal cortex mismatch response (MMR).
• The formation of these memories is associated with sleep spindle activity.

Abstract

The ability to form long-term memories begins in early infancy. However, little is known about the specific mechanisms that guide memory formation during this developmental stage. We demonstrate the emergence of a long-term memory for a novel voice in three-month-old infants using the EEG mismatch response (MMR) to the word “baby”. In an oddball-paradigm, a frequent standard, and two rare deviant voices (novel and mother) were presented before (baseline), and after (test) familiarizing the infants with the novel voice and a subsequent nap. Only the mother deviant but not the novel deviant elicited a late frontal MMR (∼850 ms) at baseline, possibly reflecting a long-term memory representation for the mother’s voice. Yet, MMRs to the novel and mother deviant significantly increased in similarity after voice familiarization and sleep. Moreover, both MMRs showed an additional early (∼250 ms) frontal negative component that is potentially related to deviance processing in short-term memory. Enhanced spindle activity during the nap predicted an increase in late MMR amplitude to the novel deviant and increased MMR similarity between novel and mother deviant. Our findings indicate that the late positive MMR in infants might reflect emergent long-term memory that benefits from sleep spindles.

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 Dates: 2024-09-142024
 Publication Status: Issued
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.nlm.2024.107987
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Title: Neurobiology of Learning and Memory
Source Genre: Journal
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Pages: - Volume / Issue: 215 Sequence Number: 107987 Start / End Page: - Identifier: ISSN: 10747427