Sleep Supports the Slow Abstraction of Gist from Visual Perceptual Memories

Overview

Journal Sci Rep

Specialty Science

Date 2017 Feb 18

PMID 28211489

Citations 31

Authors

Nicolas D Lutz

Susanne Diekelmann

Patricia Hinse-Stern

Jan Born

Karsten Rauss

Affiliations

Soon will be listed here.

Abstract

Sleep benefits the consolidation of individual episodic memories. In the long run, however, it may be more efficient to retain the abstract gist of single, related memories, which can be generalized to similar instances in the future. While episodic memory is enhanced after one night of sleep, effective gist abstraction is thought to require multiple nights. We tested this hypothesis using a visual Deese-Roediger-McDermott paradigm, examining gist abstraction and episodic-like memory consolidation after 20 min, after 10 hours, as well as after one year of retention. While after 10 hours, sleep enhanced episodic-like memory for single items, it did not affect gist abstraction. One year later, however, we found significant gist knowledge only if subjects had slept immediately after encoding, while there was no residual memory for individual items. These findings indicate that sleep after learning strengthens episodic-like memories in the short term and facilitates long-term gist abstraction.

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