1 PERFORM Center, Concordia University, 7200 Sherbrooke St W, H4B 1R6, Montreal, Canada; Department of Physics, Concordia University, 7141 Sherbrooke St W, H4B 1R6, Montreal, Canada; Center for Studies in Behavioral Neurobiology (CSBN), Concordia University, 7141 Sherbrooke St W, H4B 1R6, Montreal, Canada.
2 Center for Cognitive Neuroscience (CCNS), Department of Psychology, University of Salzburg, 34 Hellbrunnerstr., 5020, Salzburg, Austria.
3 GIGA Institute, University of Liège, 1 Avenue de l'Hôpital, 4000, Liege, Belgium; Department of Neurology, University of Liege, 1 Avenue de l'Hôpital, 4000, Liege, Belgium.
4 Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, RWTH Aachen University, Neuenhofer Weg 21, 52074, Aachen, Germany.
5 Department of Movement Sciences, KU Leuven, 101 Tervuursevest, 3001, Leuven, Belgium.
6 Department of Psychology, University of Namur, 61 Rue de Bruxelles, 5000, Namur, Belgium.
7 Department of Neuroscience, University Medical Center, 9 Chemin des Mines, 1202, Geneva, Switzerland.
8 GIGA Institute, University of Liège, 1 Avenue de l'Hôpital, 4000, Liege, Belgium.
9 PERFORM Center, Concordia University, 7200 Sherbrooke St W, H4B 1R6, Montreal, Canada; Department of Physics, Concordia University, 7141 Sherbrooke St W, H4B 1R6, Montreal, Canada; Department of Biomedical Engineering, McGill University, 3801 University St, H3A 2B4, Montreal, Canada; Department of Neurology and Neurosurgery, McGill University, 3801 University St, H3A 2B4, Montreal, Canada.
10 PERFORM Center, Concordia University, 7200 Sherbrooke St W, H4B 1R6, Montreal, Canada; Center for Studies in Behavioral Neurobiology (CSBN), Concordia University, 7141 Sherbrooke St W, H4B 1R6, Montreal, Canada; Department of Health, Kinesiology and Applied Physiology, Concordia University, 7141 Sherbrooke St W, H4B 1R6, Montreal, Canada; Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), 4545 Chemin Queen-Mary, M7834, H3W 1W5, Montreal, Canada. Electronic address: tt.dangvu@concordia.ca.

Cortical reactivations during sleep spindles following declarative learning.

Neuroimage. 2019 Jul 15;195:104-112

Authors: Jegou A, Schabus M, Gosseries O, Dahmen B, Albouy G, Desseilles M, Sterpenich V, Phillips C, Maquet P, Grova C, Dang-Vu TT

Abstract

Increasing evidence suggests that sleep spindles are involved in memory consolidation, but few studies have investigated the effects of learning on brain responses associated with spindles in humans. Here we used simultaneous electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) during sleep to assess haemodynamic brain responses related to spindles after learning. Twenty young healthy participants were scanned with EEG/fMRI during (i) a declarative memory face sequence learning task, (ii) subsequent sleep, and (iii) recall after sleep (learning night). As a control condition an identical EEG/fMRI scanning protocol was performed after participants over-learned the face sequence task to complete mastery (control night). Results demonstrated increased responses in the fusiform gyrus both during encoding before sleep and during successful recall after sleep, in the learning night compared to the control night. During sleep, a larger response in the fusiform gyrus was observed in the presence of fast spindles during the learning as compared to the control night. Our findings support a cortical reactivation during fast spindles of brain regions previously involved in declarative learning and subsequently activated during memory recall, thereby promoting the cortical consolidation of memory traces.

PMID: 30928690 [PubMed - in process]