Article (Scientific journals)
Sleep sharpens sensory stimulus coding in human visual cortex after fear conditioning.
Sterpenich, Virginie; Piguet, Camille; Desseilles, Martin et al.
2014In NeuroImage, 100, p. 608-18
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Keywords :
Adult; Amygdala/physiology; Cerebral Cortex/physiology; Conditioning, Classical/physiology; Discrimination (Psychology)/physiology; Face; Fear/physiology; Female; Functional Neuroimaging; Humans; Magnetic Resonance Imaging; Male; Neuronal Plasticity/physiology; Random Allocation; Sleep/physiology; Visual Cortex; Young Adult; Amygdala; Conditioning; Emotion; Functional MRI; Fusiform cortex; Memory consolidation; Perceptual learning; Sleep
Abstract :
[en] Efficient perceptual identification of emotionally-relevant stimuli requires optimized neural coding. Because sleep contributes to neural plasticity mechanisms, we asked whether the perceptual representation of emotionally-relevant stimuli within sensory cortices is modified after a period of sleep. We show combined effects of sleep and aversive conditioning on subsequent discrimination of face identity information, with parallel plasticity in the amygdala and visual cortex. After one night of sleep (but neither immediately nor after an equal waking interval), a fear-conditioned face was better detected when morphed with another identity. This behavioral change was accompanied by increased selectivity of the amygdala and face-responsive fusiform regions. Overnight neural changes can thus sharpen the representation of threat-related stimuli in cortical sensory areas, in order to improve detection in impoverished or ambiguous situations. These findings reveal an important role of sleep in shaping cortical selectivity to emotionally-relevant cues and thus promoting adaptive responses to new dangers.
Disciplines :
Neurology
Author, co-author :
Sterpenich, Virginie
Piguet, Camille
Desseilles, Martin ;  Université de Liège - ULiège
Ceravolo, Leonardo
Gschwind, Markus
Van De Ville, Dimitri
Vuilleumier, Patrik
Schwartz, Sophie
Language :
English
Title :
Sleep sharpens sensory stimulus coding in human visual cortex after fear conditioning.
Publication date :
2014
Journal title :
NeuroImage
ISSN :
1053-8119
eISSN :
1095-9572
Publisher :
Elsevier, Amsterdam, Netherlands
Volume :
100
Pages :
608-18
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c) 2014 Elsevier Inc. All rights reserved.
Available on ORBi :
since 14 January 2016

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