Abstract:
:Any experienced event may be encoded and retained in detail as part of our episodic memory, and may also refer and contribute to our generalized knowledge stored in semantic memory. The beginnings of this declarative memory formation are only poorly understood. Even less is known about the interrelation between episodic and semantic memory during the earliest developmental stages. Here, we show that the formation of episodic memories in 14- to 17-month-old infants depends on sleep, subsequent to exposure to novel events. Infant brain responses reveal that, after sleep-dependent consolidation, the newly stored events are not processed semantically, although appropriate lexical-semantic memories are present and accessible by similar events that were not experienced before the nap. We propose that temporarily disabled semantic processing protects precise episodic memories from interference with generalized semantic memories. Selectively restricted semantic access could also trigger semantic refinement, and thus, might even improve semantic memory.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Friedrich M,Mölle M,Friederici AD,Born Jdoi
10.1038/s41467-020-14850-8subject
Has Abstractpub_date
2020-03-10 00:00:00pages
1298issue
1issn
2041-1723pii
10.1038/s41467-020-14850-8journal_volume
11pub_type
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