1
|
Blume C, Cajochen C, Schöllhorn I, Slawik HC, Spitschan M. Effects of calibrated blue-yellow changes in light on the human circadian clock. Nat Hum Behav 2024; 8:590-605. [PMID: 38135734 PMCID: PMC10963261 DOI: 10.1038/s41562-023-01791-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 11/16/2023] [Indexed: 12/24/2023]
Abstract
Evening exposure to short-wavelength light can affect the circadian clock, sleep and alertness. Intrinsically photosensitive retinal ganglion cells expressing melanopsin are thought to be the primary drivers of these effects. Whether colour-sensitive cones also contribute is unclear. Here, using calibrated silent-substitution changes in light colour along the blue-yellow axis, we investigated whether mechanisms of colour vision affect the human circadian system and sleep. In a 32.5-h repeated within-subjects protocol, 16 healthy participants were exposed to three different light scenarios for 1 h starting 30 min after habitual bedtime: baseline control condition (93.5 photopic lux), intermittently flickering (1 Hz, 30 s on-off) yellow-bright light (123.5 photopic lux) and intermittently flickering blue-dim light (67.0 photopic lux), all calibrated to have equal melanopsin excitation. We did not find conclusive evidence for differences between the three lighting conditions regarding circadian melatonin phase delays, melatonin suppression, subjective sleepiness, psychomotor vigilance or sleep.The Stage 1 protocol for this Registered Report was accepted in principle on 9 September 2020. The protocol, as accepted by the journal, can be found at https://doi.org/10.6084/m9.figshare.13050215.v1 .
Collapse
Affiliation(s)
- Christine Blume
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Basel, Switzerland.
- Research Cluster Molecular and Cognitive Neurosciences, University of Basel, Basel, Switzerland.
- Department of Biomedicine, University of Basel, Basel, Switzerland.
| | - Christian Cajochen
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Basel, Switzerland
- Research Cluster Molecular and Cognitive Neurosciences, University of Basel, Basel, Switzerland
| | - Isabel Schöllhorn
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Basel, Switzerland
- Research Cluster Molecular and Cognitive Neurosciences, University of Basel, Basel, Switzerland
| | - Helen C Slawik
- Psychiatric Hospital of the University of Basel, Basel, Switzerland
| | - Manuel Spitschan
- Translational Sensory and Circadian Neuroscience, Max Planck Institute for Biological Cybernetics, Tübingen, Germany.
- TUM Department Health and Sport Sciences, TUM School of Medicine and Health, Technical University of Munich, Munich, Germany.
- TUM Institute for Advanced Study (TUM-IAS), Technical University of Munich, Garching, Germany.
| |
Collapse
|
2
|
Schöllhorn I, Deuring G, Stefani O, Strumberger MA, Rosburg T, Lemoine P, Pross A, Wingert B, Mager R, Cajochen C. Effects of nature-adapted lighting solutions ("Virtual Sky") on subjective and objective correlates of sleepiness, well-being, visual and cognitive performance at the workplace. PLoS One 2023; 18:e0288690. [PMID: 37535612 PMCID: PMC10399894 DOI: 10.1371/journal.pone.0288690] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 07/03/2023] [Indexed: 08/05/2023] Open
Abstract
Exposure to natural daylight benefits human well-being, alertness, circadian rhythms and sleep. Many workplaces have limited or no access to daylight. Thus, we implemented a light-panel ("Virtual Sky"), which reproduced nature-adapted light scenarios. In a laboratory office environment, three lighting scenarios were presented during the day: two lighting conditions with nature-adapted spectral light distributions, one with static and one with dynamic clouds, and a standard office lighting condition. We compared the impact of the three lighting scenarios on subjective and objective measures of alertness, cognitive performance, wellbeing, visual comfort, contrast sensitivity, and cortisol levels in 18 healthy young male volunteers in a within-participant cross-over study design. We found no evidence that an 8-h lighting scenario with static or dynamic clouds during the waking day (9am-5pm) was associated with any significant effect on objective and/or subjective alertness, cognitive performance and morning cortisol concentrations compared to standard workplace lighting. However, the dynamic light scenario was accompanied with lower levels of perceived tensionafter completing cognitive tasks and less effort to concentrate compared to the static lighting scenarios. Our findings suggest that apart from smaller effects on tension and concentration effort, nature-adapted lighting conditions did not improve daytime alertness and cognitive performance in healthy well-rested young participants, as compared to standard office lighting.
Collapse
Affiliation(s)
- Isabel Schöllhorn
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Basel, Switzerland
- Research Platform Molecular and Cognitive Neurosciences (MCN), University of Basel, Basel, Switzerland
| | - Gunnar Deuring
- Forensic Department, Basel University, University Psychiatric Clinics, Basel, Switzerland
| | - Oliver Stefani
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Basel, Switzerland
- Research Platform Molecular and Cognitive Neurosciences (MCN), University of Basel, Basel, Switzerland
| | - Michael A Strumberger
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Basel, Switzerland
- Research Platform Molecular and Cognitive Neurosciences (MCN), University of Basel, Basel, Switzerland
| | - Timm Rosburg
- Department of Clinical Research, Division of Clinical Epidemiology, EbIM Research & Education, University of Basel Hospital, Basel, Switzerland
| | - Patrick Lemoine
- Forensic Department, Basel University, University Psychiatric Clinics, Basel, Switzerland
| | - Achim Pross
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Basel, Switzerland
| | - Benjamin Wingert
- Fraunhofer-Institute for Industrial Engineering, Stuttgart, Germany
| | - Ralph Mager
- Forensic Department, Basel University, University Psychiatric Clinics, Basel, Switzerland
| | - Christian Cajochen
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Basel, Switzerland
- Research Platform Molecular and Cognitive Neurosciences (MCN), University of Basel, Basel, Switzerland
| |
Collapse
|
3
|
Bower IS, Clark GM, Tucker R, Hill AT, Lum JAG, Mortimer MA, Enticott PG. Built environment color modulates autonomic and EEG indices of emotional response. Psychophysiology 2022; 59:e14121. [PMID: 35723272 PMCID: PMC9786701 DOI: 10.1111/psyp.14121] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 02/25/2022] [Accepted: 05/19/2022] [Indexed: 12/30/2022]
Abstract
Understanding built environment exposure as a component of environmental enrichment has significant implications for mental health, but little is known about the effects design characteristics have on our emotions and associated neurophysiology. Using a Cave Automatic Virtual Environment while monitoring indoor environmental quality (IEQ), 18 participants were exposed to a resting state (black), and two room scenes, control (white) and condition (blue), to understand if the color of the virtual walls affected self-report, autonomic nervous system, and central nervous system correlates of emotion. Our findings showed that exposure to the chromatic color condition (blue) compared to the achromatic control (white) and resting-state (black, no built environment) significantly increased the range in respiration and skin conductance response. We also detected a significant increase in alpha frontal midline power and frontal hemispheric lateralization relative to blue condition, and increased power spectral density across all electrodes in the blue condition for theta, alpha, and beta bandwidths. The ability for built environment design to modulate emotional response has the potential to deliver significant public health, economic, and social benefits to the entire community. The findings show that blue coloring of the built environment increases autonomic range and is associated with modulations of brain activity linked to emotional processing.
Collapse
Affiliation(s)
- Isabella S. Bower
- Cognitive Neuroscience Unit, School of Psychology, Faculty of HealthDeakin UniversityGeelongVictoriaAustralia,School of Architecture and Built Environment, Faculty of Science, Engineering and Built EnvironmentDeakin UniversityGeelongVictoriaAustralia
| | - Gillian M. Clark
- Cognitive Neuroscience Unit, School of Psychology, Faculty of HealthDeakin UniversityGeelongVictoriaAustralia
| | - Richard Tucker
- School of Architecture and Built Environment, Faculty of Science, Engineering and Built EnvironmentDeakin UniversityGeelongVictoriaAustralia
| | - Aron T. Hill
- Cognitive Neuroscience Unit, School of Psychology, Faculty of HealthDeakin UniversityGeelongVictoriaAustralia
| | - Jarrad A. G. Lum
- Cognitive Neuroscience Unit, School of Psychology, Faculty of HealthDeakin UniversityGeelongVictoriaAustralia
| | - Michael A. Mortimer
- CADET Virtual Reality Training and Simulation Research Lab, School of Engineering, Faculty of Science, Engineering and Built EnvironmentDeakin UniversityGeelongVictoriaAustralia
| | - Peter G. Enticott
- Cognitive Neuroscience Unit, School of Psychology, Faculty of HealthDeakin UniversityGeelongVictoriaAustralia
| |
Collapse
|
4
|
Effect of Color Temperature and Illuminance on Psychology, Physiology, and Productivity: An Experimental Study. ENERGIES 2022. [DOI: 10.3390/en15124477] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In this study, we investigated the impact of the lighting environment on psychological perception, physiology, and productivity and then designed lighting control strategies based on the experimental results. The research was conducted in a smart lighting laboratory, and 67 subjects were tested in different illuminances and correlated color temperatures (CCTs). During the experiment, the physiological data of subjects were continuously recorded, while the psychology and productivity results were evaluated by questionnaires and working tests, respectively. The experimental results found that both illuminance and CCT could significantly influence the feeling of comfort and relaxation of the subjects. Warm CCT and higher illuminance (3000 K–590 lux) made subjects feel more comfortable. Productivity reached its maximum value with illuminance above 500 lux and equivalent melanopic lux (EML) higher than 150. The brain-wave and heart-rate changes did not have a close relationship with either illuminance or CCT, but the heart rate slightly increased in the adjustable lighting mode. Regardless of the initial value setting, the subjects preferred intermediate CCT (4200 K) and bright illumination (500 lux) after self-adjustment. Finally, we proposed three comprehensive lighting control strategies based on psychology, productivity, circadian rhythm, and energy-saving.
Collapse
|
5
|
Framorando D, Cai T, Wang Y, Pegna AJ. Effects of Transcranial Direct Current Stimulation on effort during a working-memory task. Sci Rep 2021; 11:16399. [PMID: 34385478 PMCID: PMC8361175 DOI: 10.1038/s41598-021-95639-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 07/28/2021] [Indexed: 02/07/2023] Open
Abstract
Transcranial Direct Current Stimulation (tDCS) has shown that stimulation of Dorsolateral Prefrontal Cortex (DLPFC) facilitates task performance in working-memory tasks. However, little is known about its potential effects on effort. This study examined whether tDCS affects effort during a working-memory task. Participants received anodal, cathodal and sham stimulation over DLPFC across three sessions before carrying out a 2-back task. During the task, effort-related cardiovascular measures were recorded-especially the Initial Systolic Time Interval (ISTI). Results showed that anodal stimulation produced a shorter ISTI, indicating a greater effort compared to cathodal and sham conditions, where effort was lower. These findings demonstrate that anodal stimulation helps participants to maintain engagement in a highly demanding task (by increasing task mastery), without which they would otherwise disengage. This study is the first to show that tDCS impacts the extent of effort engaged by individuals during a difficult task.
Collapse
Affiliation(s)
- David Framorando
- School of Psychology, The University of Queensland, Saint Lucia, Brisbane, QLD-4068, Australia.
| | - Tianlan Cai
- School of Psychology, The University of Queensland, Saint Lucia, Brisbane, QLD-4068, Australia
| | - Yi Wang
- School of Psychology, The University of Queensland, Saint Lucia, Brisbane, QLD-4068, Australia
| | - Alan J Pegna
- School of Psychology, The University of Queensland, Saint Lucia, Brisbane, QLD-4068, Australia
| |
Collapse
|
6
|
Higuchi S, Lin Y, Qiu J, Zhang Y, Ohashi M, Lee SI, Kitamura S, Yasukouchi A. Is the use of high correlated color temperature light at night related to delay of sleep timing in university students? A cross-country study in Japan and China. J Physiol Anthropol 2021; 40:7. [PMID: 34103077 PMCID: PMC8188719 DOI: 10.1186/s40101-021-00257-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 05/31/2021] [Indexed: 11/28/2022] Open
Abstract
Background Blue-enriched white light at night has the potential to delay the circadian rhythm in daily life. This study was conducted to determine whether the use of high correlated color temperature (CCT) light at home at night is associated with delay of sleep timing in university students. Methods The survey was conducted in 2014–2015 in 447 university students in Japan and 327 students in China. Habitual sleep timing and type of CCT light at home were investigated by using a self-administered questionnaire. The Japanese students were significantly later than the Chinese students in bedtime, wake time, and midpoint of sleep. They were asked whether the lighting in the room where they spend most of their time at night was closer to warm color (low CCT) or daylight color (high CCT). The amount of light exposure level during daily life was measured for at least 1 week by the use of a light sensor in 60 students in each country. Results The percentages of participants who used high CCT lighting at night were 61.6% for Japanese students and 80.8% for Chinese students. Bedtime and sleep onset time on school days and free days were significantly later in the high CCT group than in the low CCT group in Japan. The midpoint of sleep in the high CCT group was significantly later than that in the low CCT group on free days but not on school days. On the other hand, none of the sleep measurements on school days and free days were significantly different between the high CCT and low CCT groups in China. Illuminance level of light exposure during the night was significantly higher in Japanese than in Chinese, but that in the morning was significantly higher in China than in Japan. Conclusions The use of high CCT light at night is associated with delay of sleep timing in Japanese university students but not in Chinese university students. The effects of light at night on sleep timing and circadian rhythm may be complicated by other lifestyle factors depending on the country. Supplementary Information The online version contains supplementary material available at 10.1186/s40101-021-00257-x.
Collapse
Affiliation(s)
- Shigekazu Higuchi
- Department of Human Science, Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minamiku, Fukuoka, 815-8540, Japan.
| | - Yandan Lin
- Institute for Electric Light Sources, Fudan University, Shanghai, 200433, China.
| | - Jingjing Qiu
- Institute for Electric Light Sources, Fudan University, Shanghai, 200433, China
| | - Yichi Zhang
- Department of Kansei Science, Graduate School of Integrated Frontier Sciences, Kyushu University, 4-9-1 Shiobaru, Minamiku, Fukuoka, 815-8540, Japan
| | - Michihiro Ohashi
- Department of Kansei Science, Graduate School of Integrated Frontier Sciences, Kyushu University, 4-9-1 Shiobaru, Minamiku, Fukuoka, 815-8540, Japan
| | - Sang-Il Lee
- Laboratory of Environmental Ergonomics, Faculty of Engineering, Hokkaido University, Kita 8, Nishi 5, Kita-ku, Sapporo, Hokkaido, 060-0808, Japan
| | - Shingo Kitamura
- Department of Sleep-Wake Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, 4-1-1, Ogawa-Higashi, Kodaira, Tokyo, 187-8553, Japan
| | - Akira Yasukouchi
- Department of Human Science, Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minamiku, Fukuoka, 815-8540, Japan
| |
Collapse
|
7
|
Kompier ME, Smolders KCHJ, de Kort YAW. Abrupt light transitions in illuminance and correlated colour temperature result in different temporal dynamics and interindividual variability for sensation, comfort and alertness. PLoS One 2021; 16:e0243259. [PMID: 33750954 PMCID: PMC7984641 DOI: 10.1371/journal.pone.0243259] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 03/08/2021] [Indexed: 11/19/2022] Open
Abstract
Detailed insights in both visual effects of light and effects beyond vision due to manipulations in illuminance and correlated color temperature (CCT) are needed to optimize study protocols as well as to design light scenarios for practical applications. This study investigated temporal dynamics and interindividual variability in subjective evaluations of sensation, comfort and mood as well as subjective and objective measures of alertness, arousal and thermoregulation following abrupt transitions in illuminance and CCT in a mild cold environment. The results revealed that effects could be uniquely attributed to changes in illuminance or CCT. No interaction effects of illuminance and CCT were found for any of these markers. Responses to the abrupt transitions in illuminance and CCT always occurred immediately and exclusively amongst the subjective measures. Most of these responses diminished over time within the 45-minute light manipulation. In this period, no responses were found for objective measures of vigilance, arousal or thermoregulation. Significant interindividual variability occurred only in the visual comfort evaluation in response to changes in the intensity of the light. The results indicate that the design of dynamic light scenarios aimed to enhance human alertness and vitality requires tailoring to the individual to create visually comfortable environments.
Collapse
Affiliation(s)
- Maaike E. Kompier
- Human-Technology Interaction, School of Innovation Sciences, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Karin C. H. J. Smolders
- Human-Technology Interaction, School of Innovation Sciences, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Yvonne A. W. de Kort
- Human-Technology Interaction, School of Innovation Sciences, Eindhoven University of Technology, Eindhoven, the Netherlands
| |
Collapse
|
8
|
Zauner J, Plischke H, Stijnen H, Schwarz UT, Strasburger H. Influence of common lighting conditions and time-of-day on the effort-related cardiac response. PLoS One 2020; 15:e0239553. [PMID: 33027252 PMCID: PMC7540875 DOI: 10.1371/journal.pone.0239553] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 09/08/2020] [Indexed: 11/18/2022] Open
Abstract
Melanopic stimuli trigger diverse non-image-forming effects. However, evidence of a melanopic contribution to acute effects on alertness and performance is inconclusive, especially under common lighting situations. Effects on cognitive performance are likely mediated by effort-related physiological changes. We assessed the acute effects of lighting in three scenarios, at two times of day, on effort-related changes to cardiac contraction as indexed by the cardiac pre-ejection period (PEP). In a within-subject design, twenty-seven participants performed a cognitive task thrice during a morning and a late-afternoon session. We set the lighting at 500 lux in all three lighting scenarios, measured horizontally at the desk level, but with 54 lux, 128 lux, or 241 lux melanopic equivalent daylight illuminance at the eye level. Impedance cardiography and electrocardiography measurements were used to calculate PEP, for the baseline and task period. A shorter PEP during the task represents a sympathetic heart activation and therefore increased effort. Data were analysed with linear mixed-effect models. PEP changes depended on both the light scene and time of day (p = 0.01 and p = 0.002, respectively). The highest change (sympathetic activation) occurred for the medium one of the three stimuli (128 lux) during the late-afternoon session. However, effect sizes for the singular effects were small, and only for the combined effect of light and time of day middle-sized. Performance scores or self-reported scores on alertness and task demand did not change with the light scene. In conclusion, participants reached the same performance most efficiently at both the highest and lowest melanopic setting, and during the morning session. The resulting U-shaped relation between melanopic stimulus intensity and PEP is likely not dependent solely on intrinsic ipRGC stimuli, and might be moderated by extrinsic cone input. Since lighting situations were modelled according to current integrative lighting strategies and real-life indoor light intensities, the result has implications for artificial lighting in a work environment.
Collapse
Affiliation(s)
- Johannes Zauner
- Munich University of Applied Sciences, Munich, Germany
- * E-mail:
| | | | - Hanna Stijnen
- Institute of Physics, Chemnitz University of Technology, Chemnitz, Germany
| | - Ulrich T. Schwarz
- Institute of Physics, Chemnitz University of Technology, Chemnitz, Germany
| | - Hans Strasburger
- Institute of Medical Psychology, Ludwig-Maximilians-Universität, Munich, Germany
| |
Collapse
|
9
|
Effects of Sunlight on Psychological Well-Being, Job Satisfaction and Confinement Perception of Workplace: The Case of Shopkeepers and Marketers. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/978-3-030-14730-3_61] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
10
|
van der Meijden WP, Te Lindert BHW, Ramautar JR, Wei Y, Coppens JE, Kamermans M, Cajochen C, Bourgin P, Van Someren EJW. Sustained effects of prior red light on pupil diameter and vigilance during subsequent darkness. Proc Biol Sci 2018; 285:rspb.2018.0989. [PMID: 30051840 DOI: 10.1098/rspb.2018.0989] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 06/26/2018] [Indexed: 11/12/2022] Open
Abstract
Environmental light can exert potent effects on physiology and behaviour, including pupil size, vigilance and sleep. Previous work showed that these non-image forming effects can last long beyond discontinuation of short-wavelength light exposure. The possible functional effects after switching off long-wavelength light, however, have been insufficiently characterized. In a series of controlled experiments in healthy adult volunteers, we evaluated the effects of five minutes of intense red light on physiology and performance during subsequent darkness. As compared to prior darkness, prior red light induced a subsequent sustained pupil dilation. Prior red light also increased subsequent heart rate and heart rate variability when subjects were asked to perform a sustained vigilance task during the dark exposure. While these changes suggest an increase in the mental effort required for the task, it could not prevent a post-red slowing of response speed. The suggestion that exposure to intense red light affects vigilance during subsequent darkness, was confirmed in a controlled polysomnographic study that indeed showed a post-red facilitation of sleep onset. Our findings suggest the possibility of using red light as a nightcap.
Collapse
Affiliation(s)
- Wisse P van der Meijden
- Department of Sleep and Cognition, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, The Netherlands .,Sleep Disorders Center, CHU and FMTS, CNRS-UPR 3212, Institute of Cellular and Integrative Neurosciences, University of Strasbourg, 67084 Strasbourg, France.,Center for Chronobiology, Psychiatric Hospital of the University of Basel, CH-4012 Basel, Switzerland
| | - Bart H W Te Lindert
- Department of Sleep and Cognition, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, The Netherlands
| | - Jennifer R Ramautar
- Department of Sleep and Cognition, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, The Netherlands
| | - Yishul Wei
- Department of Sleep and Cognition, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, The Netherlands
| | - Joris E Coppens
- Department of Sleep and Cognition, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, The Netherlands
| | - Maarten Kamermans
- Department of Retinal Signal Processing, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, The Netherlands.,Department of Neurogenetics, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Christian Cajochen
- Center for Chronobiology, Psychiatric Hospital of the University of Basel, CH-4012 Basel, Switzerland
| | - Patrice Bourgin
- Sleep Disorders Center, CHU and FMTS, CNRS-UPR 3212, Institute of Cellular and Integrative Neurosciences, University of Strasbourg, 67084 Strasbourg, France
| | - Eus J W Van Someren
- Department of Sleep and Cognition, Netherlands Institute for Neuroscience, 1105 BA Amsterdam, The Netherlands.,Departments of Integrative Neurophysiology and Psychiatry, Center for Neurogenomics and Cognitive Research (CNCR), Neuroscience Campus Amsterdam, VU University and Medical Center, 1081 HL Amsterdam, The Netherlands
| |
Collapse
|