The Overnight Retention of Novel Metaphors Associates With Slow Oscillation–Spindle Coupling but Not With Respiratory Phase at Encoding

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Halonen , R , Kuula , L , Antila , M & Pesonen , A-K 2021 , ' The Overnight Retention of Novel Metaphors Associates With Slow Oscillation–Spindle Coupling but Not With Respiratory Phase at Encoding ' , Frontiers in Behavioral Neuroscience , vol. 15 , 712774 . https://doi.org/10.3389/fnbeh.2021.712774

Title: The Overnight Retention of Novel Metaphors Associates With Slow Oscillation–Spindle Coupling but Not With Respiratory Phase at Encoding
Author: Halonen, Risto; Kuula, Liisa; Antila, Minea; Pesonen, Anu-Katriina
Contributor organization: SLEEPWELL Research Program
Faculty of Medicine
Department of Psychology and Logopedics
Date: 2021-08-31
Language: eng
Number of pages: 14
Belongs to series: Frontiers in Behavioral Neuroscience
ISSN: 1662-5153
DOI: https://doi.org/10.3389/fnbeh.2021.712774
URI: http://hdl.handle.net/10138/338082
Abstract: Accumulating evidence emphasizes the relevance of oscillatory synchrony in memory consolidation during sleep. Sleep spindles promote memory retention, especially when occurring in the depolarized upstate of slow oscillation (SO). A less studied topic is the inter-spindle synchrony, i.e. the temporal overlap and phasic coherence between spindles perceived in different electroencephalography channels. In this study, we examined how synchrony between SOs and spindles, as well as between simultaneous spindles, is associated with the retention of novel verbal metaphors. Moreover, we combined the encoding of the metaphors with respiratory phase (inhalation/exhalation) with the aim of modulating the strength of memorized items, as previous studies have shown that inhalation entrains neural activity, thereby benefiting memory in a waking condition. In the current study, 27 young adults underwent a two-night mixed-design study with a 12-h delayed memory task during both sleep and waking conditions. As expected, we found better retention over the delay containing sleep, and this outcome was strongly associated with the timing of SO–spindle coupling. However, no associations were observed regarding inter-spindle synchrony or respiratory phase. These findings contribute to a better understanding of the importance of SO–spindle coupling for memory. In contrast, the observed lack of association with inter-spindle synchrony may emphasize the local nature of spindle-related plasticity.
Subject: 515 Psychology
3112 Neurosciences
3124 Neurology and psychiatry
metaphor
respiration
sleep spindle
slow oscillation
memory
phase lag index
SLEEP SPINDLES
MEMORY
THETA
EEG
SYNCHRONY
DYNAMICS
NETWORKS
TOOLBOX
BRAINS
MEG
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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