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Thalamic Spindles Promote Memory Formation during Sleep through Triple Phase-Locking of Cortical, Thalamic, and Hippocampal RhythmsHighly Cited Paper

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Title
Thalamic Spindles Promote Memory Formation during Sleep through Triple Phase-Locking of Cortical, Thalamic, and Hippocampal Rhythms
Author(s)
Charles-Francois V. Latchoumane; Hong-Viet V. Ngo; Jan Born; Hee-Sup Shin
Publication Date
2017-07
Journal
NEURON, v.95, no.2, pp.424 - 435
Publisher
CELL PRESS
Abstract
While the interaction of the cardinal rhythms of non-rapid-eye-movement (NREM) sleep-the thalamocortical spindles, hippocampal ripples, and the cortical slow oscillations-is thought to be critical for memory consolidation during sleep, the role spindles play in this interaction is elusive. Combining optogenetics with a closed-loop stimulation approach in mice, we show here that only thalamic spindles induced in-phase with cortical slow oscillation upstates, but not out-of-phase-induced spindles, improve consolidation of hippocampus-dependent memory during sleep. Whereas optogenetically stimulated spindles were as efficient as spontaneous spindles in nesting hippocampal ripples within their excitable troughs, stimulation in-phase with the slow oscillation up-state increased spindle co-occurrence and frontal spindle-ripple co-occurrence, eventually resulting in increased triple coupling of slow oscillation-spindle-ripple events. In-phase optogenetic suppression of thalamic spindles impaired hippocampus-dependent memory. Our results suggest a causal role for thalamic sleep spindles in hippocampus-dependent memory consolidation, conveyed through triple coupling of slow oscillations, spindles, and ripples. (c) 2017 Elsevier Inc.
URI
https://pr.ibs.re.kr/handle/8788114/3987
DOI
10.1016/j.neuron.2017.06.025
ISSN
0896-6273
Appears in Collections:
Center for Cognition and Sociality(인지 및 사회성 연구단) > 1. Journal Papers (저널논문)
Center for Cognition and Sociality(인지 및 사회성 연구단) > Social Neuroscience Group(사회성 뇌과학 그룹) > 1. Journal Papers (저널논문)
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