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Navarrete M, Osorio-Forero A, Gómez A, Henao D, Segura-Quijano FE, Le Van Quyen M, Valderrama M. Response of sleep slow oscillations to acoustic stimulation is evidenced by distinctive synchronization processes. Sleep 2023:7113721. [PMID: 37039660 DOI: 10.1093/sleep/zsad110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Indexed: 04/12/2023] Open
Abstract
Closed loop acoustic stimulation (CLAS) during sleep has shown to boost slow wave (SW) amplitude and spindle power. Moreover, sleep SW have been classified based on different processes of neuronal synchronization. Thus, different types of SW events may have distinct functional roles and be differentially affected by external stimuli. However, the SW synchronization processes affected by CLAS are not well understood. Here, we studied the effect of CLAS on the dissociation of SW events based on two features of neuronal synchronization in the EEG (topological spread and wave slope). We evaluated and classified individual SW events of fourteen healthy subjects during a CLAS stimulated (STM) and a control night (CNT). Three main categories of SW events were found denoting (C1) steep-slope SW with global spread, (C2) flat-slope waves with localized spread and homeostatic decline, and (C3) multipeaked flat-slope events with global spread. Comparing between conditions, we found a consistent increase of event proportion and trough amplitudes for C1 events during the time of stimulation. Furthermore, we found similar increases in post-stimulus spectral power in θ, β and σ frequencies for CNT vs STIM condition independently of sleep stage or SW categories. However, topological analysis showed differentiated spatial dynamics in N2 and N3 for SW categories and the co-occurrence with spindle events. Our findings support the existence of multiple types of SW with differential response to external stimuli and possible distinct neuronal mechanisms.
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Affiliation(s)
- Miguel Navarrete
- Department of Biomedical Engineering, University of Los Andes, Cra. 1 N° 18A-12, Bogotá, Colombia
| | - Alejandro Osorio-Forero
- Department of Biomedical Engineering, University of Los Andes, Cra. 1 N° 18A-12, Bogotá, Colombia
- Department of Fundamental Neurosciences, University of Lausanne, Rue du Bugnon 9, CH- 1005 Lausanne, Switzerland
| | - Angela Gómez
- Department of Psychology, University of Los Andes, Cra. 1 N° 18A-12, Bogota, Colombia
| | - David Henao
- Department of Biomedical Engineering, University of Los Andes, Cra. 1 N° 18A-12, Bogotá, Colombia
| | - Fredy E Segura-Quijano
- Department of Electrical and Electronic Engineering, University of Los Andes, Cra. 1 N° 18A-12, Bogotá, Colombia
| | - Michel Le Van Quyen
- Laboratoire d'Imagerie Biomédicale (LIB), U1146 INSERM- SU - CNRS 7371, Campus des Cordeliers, 15 rue de l'Ecole de Médecine, Paris, France
| | - Mario Valderrama
- Department of Biomedical Engineering, University of Los Andes, Cra. 1 N° 18A-12, Bogotá, Colombia
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Reid A, Bloxham A, Carr M, van Rijn E, Basoudan N, Tulip C, Blagrove M. Effects of sleep on positive, negative and neutral valenced story and image memory. Br J Psychol 2022; 113:777-797. [PMID: 35253902 PMCID: PMC9545409 DOI: 10.1111/bjop.12559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 02/08/2022] [Indexed: 11/27/2022]
Abstract
During sleep, emotional memories are preferentially strengthened. However, most studies on sleep and emotional memory focus on comparing negative valence with neutral valence stimuli. This study compared the sleep‐dependent memory effects for stories and images, each comprising negative, neutral, and positive stimuli. It was hypothesized that a sleep effect would be seen for negatively and positively valenced stimuli. A novel story memory task (comprising three stories), and photographs from the Nencki Affective Picture database were presented for learning to 61 healthy adults (ages 18–25). They were tested for memory on the two tasks immediately, and then again after either a 2‐hr nap (n = 31; 17 women, 14 men) or 2‐hr wake period (n = 30; 13 women, 17 men). At second testing, the sleep condition had significantly better recall compared to the wake condition on both tasks. There was a relationship with valence only for the story task, with better performance for the sleep condition on the negatively and positively valenced texts, but not on the neutral text. There were no significant relationships between memory measures and sleep‐stage duration and EEG power variables. The story memory findings support the hypothesis that memory consolidation prioritizes emotional memory, whether positively or negatively valenced.
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Affiliation(s)
- Alex Reid
- Sleep Laboratory, Faculty of Medicine, Health and Life Science, School of Psychology, Swansea University, Swansea, UK
| | - Anthony Bloxham
- Sleep Laboratory, Faculty of Medicine, Health and Life Science, School of Psychology, Swansea University, Swansea, UK
| | - Michelle Carr
- Sleep Laboratory, Faculty of Medicine, Health and Life Science, School of Psychology, Swansea University, Swansea, UK
| | - Elaine van Rijn
- Sleep Laboratory, Faculty of Medicine, Health and Life Science, School of Psychology, Swansea University, Swansea, UK
| | - Nasreen Basoudan
- Sleep Laboratory, Faculty of Medicine, Health and Life Science, School of Psychology, Swansea University, Swansea, UK
| | - Chloe Tulip
- Sleep Laboratory, Faculty of Medicine, Health and Life Science, School of Psychology, Swansea University, Swansea, UK
| | - Mark Blagrove
- Sleep Laboratory, Faculty of Medicine, Health and Life Science, School of Psychology, Swansea University, Swansea, UK
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Dehnavi F, Koo-Poeggel PC, Ghorbani M, Marshall L. Spontaneous slow oscillation - slow spindle features predict induced overnight memory retention. Sleep 2021; 44:6277833. [PMID: 34003291 PMCID: PMC8503833 DOI: 10.1093/sleep/zsab127] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 05/06/2021] [Indexed: 11/13/2022] Open
Abstract
Study Objectives Synchronization of neural activity within local networks and between brain regions is a major contributor to rhythmic field potentials such as the EEG. On the other hand, dynamic changes in microstructure and activity are reflected in the EEG, for instance slow oscillation (SO) slope can reflect synaptic strength. SO-spindle coupling is a measure for neural communication. It was previously associated with memory consolidation, but also shown to reveal strong interindividual differences. In studies, weak electric current stimulation has modulated brain rhythms and memory retention. Here, we investigate whether SO-spindle coupling and SO slope during baseline sleep are associated with (predictive of) stimulation efficacy on retention performance. Methods Twenty-five healthy subjects participated in three experimental sessions. Sleep-associated memory consolidation was measured in two sessions, in one anodal transcranial direct current stimulation oscillating at subjects individual SO frequency (so-tDCS) was applied during nocturnal sleep. The third session was without a learning task (baseline sleep). The dependence on SO-spindle coupling and SO-slope during baseline sleep of so-tDCS efficacy on retention performance were investigated. Results Stimulation efficacy on overnight retention of declarative memories was associated with nesting of slow spindles to SO trough in deep nonrapid eye movement baseline sleep. Steepness and direction of SO slope in baseline sleep were features indicative for stimulation efficacy. Conclusions Findings underscore a functional relevance of activity during the SO up-to-down state transition for memory consolidation and provide support for distinct consolidation mechanisms for types of declarative memories.
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Affiliation(s)
- Fereshteh Dehnavi
- Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Ping Chai Koo-Poeggel
- Institute of Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Ratzeburger Allee, Lübeck, Germany.,Center of Brain, Behavior and Metabolism, University of Lübeck, Lübeck
| | - Maryam Ghorbani
- Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.,Rayan Center for Neuroscience and Behavior, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Lisa Marshall
- Institute of Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Ratzeburger Allee, Lübeck, Germany.,Center of Brain, Behavior and Metabolism, University of Lübeck, Lübeck
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Pascovich C, Niño S, Mondino A, Lopez-Hill X, Urbanavicius J, Monti J, Lagos P, Torterolo P. Microinjection of melanin-concentrating hormone (MCH) into the median raphe nucleus promotes REM sleep in rats. Sleep Sci 2021; 14:229-235. [PMID: 35186201 PMCID: PMC8848522 DOI: 10.5935/1984-0063.20200075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 10/30/2020] [Indexed: 11/20/2022] Open
Abstract
Melanin concentrating hormone (MCH) is a sleep-promoting neuromodulator synthesized by neurons located in the postero-lateral hypothalamus and incerto-hypothalamic area. MCHergic neurons have widespread projections including the serotonergic dorsal (DR) and median (MnR) raphe nuclei, both involved in the control of wakefulness and sleep. In the present study, we explored in rats the presence of the MCH receptor type 1 (MCHR-1) in serotonergic neurons of the MnR by double immunofluorescence. Additionally, we analyzed the effect on sleep of MCH microinjections into the MnR. We found that MCHR-1 protein was present in MnR serotonergic and non-serotonergic neurons. In this respect, the receptor was localized in the primary cilia of these neurons. Compared with saline, microinjections of MCH into the MnR induced a dose-related increase in REM sleep time, which was related to a rise in the number of REM sleep episodes, associated with a reduction in the time spent in W. No significant changes were observed in non-REM (NREM) sleep time. Our data strongly suggest that MCH projections towards the MnR, acting through the MCHR-1 located in the primary cilia, promote REM sleep.
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Affiliation(s)
- Claudia Pascovich
- Facultad de Medicina, Universidad de la República, Fisiología, Montevideo - Uruguay
| | - Sofia Niño
- Facultad de Medicina, Universidad de la República, Fisiología, Montevideo - Uruguay
| | - Alejandra Mondino
- Facultad de Medicina, Universidad de la República, Fisiología, Montevideo - Uruguay
| | - Ximena Lopez-Hill
- Instituto de Investigaciones Biológicas Clemente Estable, Neurofarmacología Experimental, Montevideo - Uruguay
| | - Jessika Urbanavicius
- Instituto de Investigaciones Biológicas Clemente Estable, Neurofarmacología Experimental, Montevideo - Uruguay
| | - Jaime Monti
- Hospital de Clínicas, Farmacología y Terapéutica, Montevideo - Uruguay
| | - Patricia Lagos
- Facultad de Medicina, Universidad de la República, Fisiología, Montevideo - Uruguay
| | - Pablo Torterolo
- Facultad de Medicina, Universidad de la República, Fisiología, Montevideo - Uruguay. ,Corresponding author: Pablo Torterolo. E-mail: /
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Kwon Y, Gadi S, Shah NR, Stout C, Blackwell JN, Cho Y, Koene RJ, Mehta N, Mazimba S, Darby AE, Ferguson JD, Bilchick KC. Atrial Fibrillation and Objective Sleep Quality by Slow Wave Sleep. J Atr Fibrillation 2018; 11:2031. [PMID: 30505377 PMCID: PMC6244306 DOI: 10.4022/jafib.2031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 06/16/2018] [Accepted: 07/17/2018] [Indexed: 12/20/2022]
Abstract
BACKGROUND Self-reported poor sleep quality has been suggested in patients with AF. Slow wave sleep (SWS) is considered the most restorative sleep stage and represents an important objective measure of sleep quality. The aim of this study was to compare quantity of SWS between patients with and without AF. METHODS AND RESULTS We included patients with and without a documented history of AF by reviewing clinically indicated polysomnography data from a single sleep center. Patients on medications with potential influence on sleep architecture were excluded. Logistic regression was performed to determine the association between AF and SWS time (low vs. high) adjusting for age, gender, body mass index, and sleep apnea. In a 2:1 case-control set-up, a total of 205 subjects (139 with AF, 66 without AF) were included. Mean age was 62 (SD: 14.3) years and 59% were men. Patients with AF had lower SWS time (11.1 vs. 16.6 min, p=0.02). In multivariable analysis, prevalent AF was associated with low SWS independent of sleep apnea and other potential confounders (OR 2.5 [1.3, 5.0], p=0.006). Limiting the analysis to patients whose total sleep time was greater than 4 hours (by excluding N=31) resulted in more robust results (OR 3.9 [1.7, 9.7]. p=0.002). CONCLUSION AF is associated with more impaired sleep quality as indicated by lower quantity of SWS. More studies are needed to explore the mechanistic interactions between AF and sleep.
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Affiliation(s)
- Younghoon Kwon
- Cardiovascular Division, Department of Medicine, University of Virginia
| | - Sneha Gadi
- Cardiovascular Division, Department of Medicine, University of Virginia
| | - Neil R Shah
- Cardiovascular Division, Department of Medicine, University of Virginia
| | - Christopher Stout
- Cardiovascular Division, Department of Medicine, University of Virginia
| | - Jacob N Blackwell
- Cardiovascular Division, Department of Medicine, University of Virginia
- Department of Cardiovascular Medicine, Electrophysiology Section, Cleveland Clinic Foundation
| | - Yeilim Cho
- Cardiovascular Division, Department of Medicine, University of Virginia
| | - Ryan J Koene
- Department of Cardiovascular Medicine, Electrophysiology Section, Cleveland Clinic Foundation
| | - Nishaki Mehta
- Cardiovascular Division, Department of Medicine, University of Virginia
| | - Sula Mazimba
- Cardiovascular Division, Department of Medicine, University of Virginia
| | - Andrew E Darby
- Cardiovascular Division, Department of Medicine, University of Virginia
| | - John D Ferguson
- Cardiovascular Division, Department of Medicine, University of Virginia
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