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McAlpine T, Mullan B, Clarke PJF. Assessing the daily association of sleep hygiene behaviours with sleep: A between and within persons approach. J Behav Med 2024; 47:255-270. [PMID: 37702911 PMCID: PMC10944446 DOI: 10.1007/s10865-023-00448-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 08/19/2023] [Indexed: 09/14/2023]
Abstract
Sleep hygiene behaviours are recommendations given to both clinical and non-clinical populations with a focus on modifying behaviours to maximise sleep outcomes. However, methodological issues present in sleep hygiene research make it difficult to conclusively determine the impact of each behaviour. This study aimed to address these issues by adopting a two-week, repeated measures design which incorporated objective sleep measures and used linear mixed effect modelling to assess the daily association of a wide range of sleep hygiene behaviours on sleep in a non-clinical, university sample. Between-persons effects revealed that bedtime and frequency of daytime napping, alcohol use, and social media use were negatively related to sleep duration while waketime and frequency of too much water consumption were positively related to sleep duration. Within-person effects revealed that later than usual bedtime, earlier than usual waketime, no sunlight exposure, poor ventilation, having an unpleasant conversation before bed were negatively associated with sleep duration whereas using alcohol to deliberately help full asleep was positively related to sleep duration. In contrast, disproportionately more behaviours were not significantly related to either sleep outcome, only some of which could be explained by individual differences, which suggests that more research is needed to determine the conditions under which these behaviours affect sleep, if at all.
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Affiliation(s)
- Thomas McAlpine
- enAble Institute, Curtin University, Bentley, WA, 6102, Australia
- School of Population Health, Curtin University, Bentley, WA, 6102, Australia
| | - Barbara Mullan
- enAble Institute, Curtin University, Bentley, WA, 6102, Australia.
- School of Population Health, Curtin University, Bentley, WA, 6102, Australia.
| | - Patrick J F Clarke
- enAble Institute, Curtin University, Bentley, WA, 6102, Australia
- School of Population Health, Curtin University, Bentley, WA, 6102, Australia
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Feder MA, Baroni A. Just Let Me Sleep in: Identifying and Treating Delayed Sleep Phase Disorder in Adolescents. Psychiatr Clin North Am 2024; 47:163-178. [PMID: 38302205 DOI: 10.1016/j.psc.2023.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Individuals with delayed sleep phase disorder (DSPD) are unable to naturally fall asleep and awake at conventional times; for this reason, DSPD is often mistaken for insomnia. However, unlike many patients with insomnia, those with DSPD struggle to get up at appropriate times. DSPD is associated with school refusal, academic difficulties, and lower employment rate. DSPD in youth has prevalence as high as 16%, and is often comorbid with other psychiatric disorders. Treatments include appropriate light exposure during the day, melatonin use, developing an evening routine that minimizes arousal-increasing activities, and gradually shifting sleep-wake times toward more functional ones.
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Affiliation(s)
- Michael A Feder
- Department of Child and Adolescent Psychiatry, Hassenfeld Children's Hospital at NYU Langone, NYC H+H/Bellevue, New York, NY, USA; Child Study Center, One Park Avenue, 7th Floor, New York, NY 10016, USA
| | - Argelinda Baroni
- Department of Child and Adolescent Psychiatry, NYU Grossman School of Medicine, One Park Avenue, 7th Floor, New York, NY 10016, USA.
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3
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Pastor-Idoate S, Mateos-Olivares M, Sobas EM, Marcos M, Toribio A, Pastor JC, Usategui Martín R. Short-Wavelength Light-Blocking Filters and Oral Melatonin Administration in Patients With Retinitis Pigmentosa: Protocol for a Randomized Controlled Trial. JMIR Res Protoc 2023; 12:e49196. [PMID: 37971796 PMCID: PMC10690531 DOI: 10.2196/49196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 09/27/2023] [Accepted: 10/10/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND The medical community is beginning to recognize that retinitis pigmentosa (RP), due to its disabling progression, eventually leads to a reduction in the patient´s quality of life, a direct economic impact, and an increase in the burden on the health care system. There is no curative treatment for the origin of the disease, and most of the current interventions fail in reducing the associated negative psychological states, such as anxiety and depression, which lead to increased variability of vision and pose a continuous threat to the patient's independence. OBJECTIVE The aim of this study is to assess the effect of oral melatonin (OM) administration alone and combined with short-wavelength light (SWL)-blocking filters on patients with RP and test their effectiveness in improving the level of stress and sleep problems in many of these patients. METHODS We have developed a low-cost therapy protocol for patients with RP with sleep disorders and negative psychological stress. Patients will be randomized to receive a combined intervention with SWL-blocking filters and OM, SWL-blocking filters alone, or OM alone. There will also be a nonintervention arm as a control group. This study will be conducted across 2 retinal units in patients with RP with sleep disorders and high perceived stress and anxiety score reports. Patients will be assessed in the preintervention period, weekly during the 4 weeks of intervention, and then at 6 months postintervention. The primary outcomes are the differences in changes from baseline to postintervention in hormone release (α-amylase, cortisol, and melatonin) and sleep quality, as measured with the visual analog scale. Secondary outcome measures include clinical macular changes, as measured with optical coherence tomography and optical coherence tomography angiography; retinal function, as measured using the visual field and best-corrected visual acuity; sleep data collected from personal wearables; and several patient-reported variables, such as self-recorded sleep diaries, quality of life, perceived stress, and functional status. RESULTS This project is still a study protocol and has not yet started. Bibliographic research for information for its justification began in 2020, and this working group is currently seeking start-up funding. As soon as we have the necessary means, we will proceed with the registration and organization prior to the preliminary phase. CONCLUSIONS In this feasibility randomized clinical controlled trial, we will compare the effects of SWL blocking alone, administration of OM alone, and a combined intervention with both in patients with RP. We present this study so that it may be replicated and incorporated into future studies at other institutions, as well as applied to additional inherited retinal dystrophies. The goal of presenting this protocol is to aid recent efforts in reducing the impact of sleeping disorders and other psychological disorders on the quality of life in patients with RP and recovering their self-autonomy. In addition, the results of this study will represent a significant step toward developing a novel low-cost therapy for patients with RP and validating a novel therapeutic target. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) PRR1-10.2196/49196.
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Affiliation(s)
- Salvador Pastor-Idoate
- Institute of Applied Ophthalmobiology, University of Valladolid, Valladolid, Spain
- Department of Ophthalmology, Clinical University Hospital of Valladolid, Valladolid, Spain
- Networks of Cooperative Research oriented to Health Results, National Institute of Health Carlos III, Madrid, Spain
- European Reference Network dedicated to Rare Eye Diseases, Valladolid, Spain
| | - Milagros Mateos-Olivares
- Department of Ophthalmology, Clinical University Hospital of Valladolid, Valladolid, Spain
- Department of Ophthalmology, Clinical University Hospital of Caceres, Caceres, Spain
| | - Eva María Sobas
- Institute of Applied Ophthalmobiology, University of Valladolid, Valladolid, Spain
- Nursing School, University of Valladolid, Valladolid, Spain
| | - Miguel Marcos
- Department of Internal Medicine, University Hospital of Salamanca, Salamanca, Spain
- Institute of Biomedical Research of Salamanca, University of Salamanca, Salamanca, Spain
| | - Alfredo Toribio
- Federation of Associations of Hereditary Retinal Dystrophies in Spain, Valladolid, Spain
| | - José Carlos Pastor
- Institute of Applied Ophthalmobiology, University of Valladolid, Valladolid, Spain
- Networks of Cooperative Research oriented to Health Results, National Institute of Health Carlos III, Madrid, Spain
- European Reference Network dedicated to Rare Eye Diseases, Valladolid, Spain
| | - Ricardo Usategui Martín
- Institute of Applied Ophthalmobiology, University of Valladolid, Valladolid, Spain
- Department of Cellular Biology, Faculty of Medicine, University of Valladolid, Valladolid, Spain
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Nguyen QK, Glorieux B, Sebe G, Yang TH, Yu YW, Sun CC. Passive anti-leakage of blue light for phosphor-converted white LEDs with crystal nanocellulose materials. Sci Rep 2023; 13:13039. [PMID: 37563271 PMCID: PMC10415365 DOI: 10.1038/s41598-023-39929-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 08/02/2023] [Indexed: 08/12/2023] Open
Abstract
A phenomenon known as "blue-light leakage" caused by overheating pcW-LEDs has recently been identified, and it poses a risk to users. This study focuses on investigating and optimizing a solution to address this issue. To tackle the problem of overheating and blue light leakage, we explored the application of a specific thermochromic material called crystal nano cellulose (CNC). We introduced CNC inside the epoxy lens of white LEDs. Importantly, under standard conditions, CNC has a negligible impact on the optical properties of the output white light. However, when overheating conditions arise, leading to blue light leakage, the temperature increase triggers a darkening effect in CNC. This thermochromic behavior of CNC allows it to strongly absorb the blue light, resulting in a significant suppression of the output luminous flux. As a result, the lamp dims, which not only prevents the user's eyes from being exposed to harmful bluish light but also serves as an indicator of aging in the pcW-LED. By implementing CNC as a responsive material in the design of white LEDs, this study offers a practical and effective solution to mitigate the negative effects of blue-light leakage caused by overheating. This improvement enhances the safety and comfort of users while also providing an early warning system for the aging of pcW-LEDs.
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Affiliation(s)
- Quang-Khoi Nguyen
- Department of Optics and Photonics, National Central University, Chung-Li, 32001, Taiwan
- Falculty of Physics and Engineering Physics, VNUHCM-University of Science, Ho Chi Minh City, 700000, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
| | - Benoit Glorieux
- Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600, Pessac, France
| | - Gilles Sebe
- Univ. Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, F-33600, Pessac, France
| | - Tsung-Hsun Yang
- Department of Optics and Photonics, National Central University, Chung-Li, 32001, Taiwan
| | - Yeh-Wei Yu
- Department of Optics and Photonics, National Central University, Chung-Li, 32001, Taiwan
| | - Ching-Cherng Sun
- Department of Optics and Photonics, National Central University, Chung-Li, 32001, Taiwan.
- Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan.
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Genario R, Gil S, Oliveira-Júnior G, Leitão AE, Franco T, Dos Santos Sales RC, Ferriolli E, Busse AL, Filho WJ, Gualano B, Roschel H. Sleep quality is a predictor of muscle mass, strength, quality of life, anxiety and depression in older adults with obesity. Sci Rep 2023; 13:11256. [PMID: 37438429 DOI: 10.1038/s41598-023-37921-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 06/29/2023] [Indexed: 07/14/2023] Open
Abstract
We aimed to investigate associations between sleep quality with selected quantitative and qualitative parameters of health in older individuals with obesity. Cross-sectional assessment (n = 95 men/women; ≥ 65 years; BMI ≥ 30 kg/m2) of sleep quality, body composition, handgrip strength, quality-of-life, anxiety/depression. Mean PSQI score was 6.3. Poor sleepers (n = 49) presented lower appendicular lean mass (ALM) (16.2 vs 17.8 kg; p = 0.0273), ALM/BMI (0.47 vs 0.53 kg/BMI; p = 0.0085), fat mass (48.6 vs 46.6%; p = 0.0464), handgrip strength (19.7 vs 22.0 kgf; p = 0.0542) and handgrip/BMI (0.57 vs 0.66 kgf/BMI; p = 0.0242) than good sleepers. They also had higher anxiety (8.6 vs 5.6; p = 0.0100) and depression (4.8 vs 3.2; p = 0.0197) scores, worse health-related quality-of-life and lower scores in mental (62.8 vs 73.0; p = 0.0223) and physical (52.9 vs 67.3; p = 0.0015) domains. Adjusted models showed that PSQI was negatively associated with ALM (β = - 0.13, 95% CI - 0.25; - 0.01) and health-related quality of life on physical (β = - 2.76, 95% CI - 3.82; - 1.70) and mental (β = - 2.25, 95% CI - 3.38; - 1.12) domains, and positively associated with anxiety (β = 0.57; 95% CI 0.26; 0.87) and depression (β = 0.31; 95% CI 0.13; 0.49). Poor sleep quality associates with impaired selected quantitative and qualitative parameters of health. Additionally, sleep quality was shown as an independent predictor of ALM, health-related quality-of-life, anxiety and depression in older individuals with obesity.
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Affiliation(s)
- Rafael Genario
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, School of Medicine, Universidade de Sao Paulo, Sao Paulo, Brazil
- Rheumatology Division, Clinical Hospital, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Saulo Gil
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, School of Medicine, Universidade de Sao Paulo, Sao Paulo, Brazil
- Rheumatology Division, Clinical Hospital, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Gersiel Oliveira-Júnior
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, School of Medicine, Universidade de Sao Paulo, Sao Paulo, Brazil
- Rheumatology Division, Clinical Hospital, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Alice Erwig Leitão
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, School of Medicine, Universidade de Sao Paulo, Sao Paulo, Brazil
- Rheumatology Division, Clinical Hospital, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Tathiane Franco
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, School of Medicine, Universidade de Sao Paulo, Sao Paulo, Brazil
- Rheumatology Division, Clinical Hospital, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Ruan Célio Dos Santos Sales
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, School of Medicine, Universidade de Sao Paulo, Sao Paulo, Brazil
- Rheumatology Division, Clinical Hospital, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Eduardo Ferriolli
- Division of Internal and Geriatric Medicine, Department of Internal Medicine-Ribeirão Preto Medical School, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Alexandre Leopold Busse
- Laboratorio de Investigacao Medica em Envelhecimento (LIM-66), Serviço de Geriatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Wilson Jacob Filho
- Laboratorio de Investigacao Medica em Envelhecimento (LIM-66), Serviço de Geriatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Bruno Gualano
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, School of Medicine, Universidade de Sao Paulo, Sao Paulo, Brazil
- Rheumatology Division, Clinical Hospital, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Hamilton Roschel
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, School of Medicine, Universidade de Sao Paulo, Sao Paulo, Brazil.
- Rheumatology Division, Clinical Hospital, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil.
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Fullagar HHK, Vincent GE, McCullough M, Halson S, Fowler P. Sleep and Sport Performance. J Clin Neurophysiol 2023; 40:408-416. [PMID: 36930212 DOI: 10.1097/wnp.0000000000000638] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023] Open
Abstract
SUMMARY Elite athletes and coaches believe sleep is the most important recovery strategy and widely consider it critical to optimal performance. Despite this perceived importance, there are numerous circumstances that can reduce sleep quantity and quality in athletic populations. Because of the effects of sleep loss on various physical, neurophysiological, and cognitive parameters, such perturbations can have consequences for performance and recovery outcomes. Although peer-reviewed literature examining the interaction between sleep, performance, and recovery in athletes is increasing, understanding of these issues remains equivocal. Perhaps most pertinently, the effect of sleep on sport performance does not align with a one-size-fits-all approach and rather depends on numerous factors such as type of sport, scheduling, time of the season, and the intraindividual requirements for sleep. The relationship between brain plasticity and memory, which in turn can influence learning processes and long-term memory consolidation, suggests that sleep may play an important role in learning new skills and tactics for both elite and developing athletes. The aim of this special issue review was to analyze the evidence of sleep loss on sport performance and recovery, with a specific focus on elite athletes. An assessment of these sleep-compromising situations that elite athletes may face during a typical season and practical considerations for alleviating these issues is also provided to further the understanding for medical professionals, scientists, and applied sporting practitioners alike.
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Affiliation(s)
- Hugh H K Fullagar
- Sport & Exercise Discipline Group, Faculty of Health, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Grace E Vincent
- School of Health, Medical and Applied Sciences, Appleton Institute, Central Queensland University, Adelaide, South Australia, Australia
| | | | - Shona Halson
- School of Behavioural and Health Sciences, Australian Catholic University, Fitzroy, Victoria, Australia ; and
| | - Peter Fowler
- Faculty of Health, Queensland University of Technology, Brisbane City, Queensland, Australia
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Kureshi S, Stowe C, Francis J, Djalilian H. Circadian therapy interventions for glymphatic dysfunction in concussions injuries: A narrative review. Sci Prog 2023; 106:368504231189536. [PMID: 37499049 PMCID: PMC10388340 DOI: 10.1177/00368504231189536] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
There are two primary threats to the brain after concussion. The first is a buildup of neurotoxic proteins in the brain. The second, a partial consequence of the first, is a sustained neuroinflammatory response that may lead to central sensitization and the development of persistent post-concussive symptoms. These threats make neurotoxin clearance a high clinical priority in the acute period after injury. The glymphatic system is the brain's primary mechanism for clearing neurotoxic waste. The glymphatic system is intimately tied to the sleep cycle and circadian dynamics. However, glymphatic dysfunction and sleep disturbances are nearly ubiquitous in the acute period after concussion injury. Because of this, sleep optimization via circadian therapy is a time-sensitive and critical tool in acute concussion management.
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Affiliation(s)
- Sohaib Kureshi
- Neurosurgical Medical Clinic, San Diego, CA, USA
- TBI Virtual, San Diego, CA, USA
| | | | | | - Hamid Djalilian
- TBI Virtual, San Diego, CA, USA
- Department of Otolaryngology-Head and Neck Surgery, University of California, Irvine, CA, USA
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Hartley S, Royant-Parola S, Zayoud A, Gremy I, Matulonga B. Do both timing and duration of screen use affect sleep patterns in adolescents? PLoS One 2022; 17:e0276226. [PMID: 36264928 PMCID: PMC9584513 DOI: 10.1371/journal.pone.0276226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 10/03/2022] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Sleep duration has declined in adolescents over the last 30 years and screen use has been identified as a risk factor. Studies have examined the duration of screen use and screen-based activities but have not differentiated between evening and night-time use. METHODS Cross sectional questionnaire survey of adolescents recruited in schools. Sleep habits on school nights and weekends, symptoms of insomnia and daytime repercussions were recorded using an online questionnaire administered in the classroom setting. Sleep deprivation (<7 hours in bed /night), school night sleep restriction (≥2 hours difference in sleep duration on school nights vs weekends), excessive sleepiness (score >6 on a visual analogue scale), duration of screen use and timing of screen use (evening vs after bedtime) were determined. RESULTS 2513 students (53.4% female, median age 15 years) were included. 20% were sleep deprived and 41% sleep restricted. A clear dose effect relationship in a model controlling for age, sex, school level and sociodemographic class was seen with all levels of night-time screen use on sleep deprivation and sleep restriction (>2 hours use sleep deprivation OR 5.23[3.03-9.00]. sleep restriction OR 2.05[1.23-3.42]) and > 2 hours evening use (>2 hours use sleep deprivation OR 2.72[2.15-3.44] sleep restriction OR 1.69[1.36-2.11]) but not moderate evening use. All night-time use and > 2 hours evening use increased the risk of insomnia, non refreshing sleep, and affected daytime function (daytime sleepiness, lack of energy and irritability). CONCLUSIONS Both duration of screen use and timing are associated with adverse effects on sleep and daytime functioning in adolescents. More than 2 hours evening use and all night-time use should be avoided.
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Affiliation(s)
- Sarah Hartley
- Réseau Morphée, Garches, France
- APHP Hôpital Raymond Poincaré, Sleep Center, Université de Versailles Saint-Quentin en Yvelines, Garches, France
| | | | - Ayla Zayoud
- Institut Paris Région, Observatoire Régional de Santé, Paris, France
| | - Isabelle Gremy
- Institut Paris Région, Observatoire Régional de Santé, Paris, France
| | - Bobette Matulonga
- Institut Paris Région, Observatoire Régional de Santé, Paris, France
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Silvani MI, Werder R, Perret C. The influence of blue light on sleep, performance and wellbeing in young adults: A systematic review. Front Physiol 2022; 13:943108. [PMID: 36051910 PMCID: PMC9424753 DOI: 10.3389/fphys.2022.943108] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/30/2022] [Indexed: 11/13/2022] Open
Abstract
Introduction: Blue light from electronic devices has a bad reputation. It has a wavelength which may influence our circadian rhythm and cause bad sleep. But there are other aspects of blue light exposure which are often overlooked, for example, it may influence performance and wellbeing. However, few resources summarize its effects systematically. Therefore, the goal of this systematic review was to distil the present evidence on blue light exposure and its influence on sleep, performance and wellbeing and discuss its significance for athletes.Methods: The databases that were searched were Cochrane, Embase, Pubmed, Scopus, and Virtual Health Library. The studies included investigated the influence of blue light exposure on either sleep, performance, wellbeing or a combination of those parameters on healthy humans. Quality assessment was done based on the quantitative assessment tool “QualSyst.”Results: Summarizing the influence of blue light exposure, the following results were found (expressed as proportion to the number of studies investigating the particular parameter): Fifty percent of studies found tiredness to be decreased. One fifth of studies found sleep quality to be decreased and one third found sleep duration to be decreased. Half of the studies found sleep efficacy to be decreased and slightly less than half found sleep latency to be increased. More than one half of the studies found cognitive performance to be increased. Slightly more than two thirds found alertness to be increased and reaction time to be decreased. Slightly less than half of the studies found wellbeing to be increased.Conclusion: Blue light exposure can positively affect cognitive performance, alertness, and reaction time. This might benefit sports reliant on team-work and decision-making and may help prevent injury. Blue light might also have negative effects such as the decrease in sleep quality and sleep duration, which might worsen an athlete’s physical and cognitive performance and recovery. Further research should explore if blue light can improve sleep, performance and wellbeing to significantly benefit athletic performance.
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Affiliation(s)
| | - Robert Werder
- Institute of Sports Medicine, Swiss Paraplegic Centre, Nottwil, Switzerland
| | - Claudio Perret
- Institute of Sports Medicine, Swiss Paraplegic Centre, Nottwil, Switzerland
- *Correspondence: Claudio Perret,
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Sun CC, Nguyen QK, Lee TX, Lin SK, Wu CS, Yang TH, Yu YW. Active thermal-fuse for stopping blue light leakage of white light-emitting diodes driven by constant current. Sci Rep 2022; 12:12433. [PMID: 35859113 PMCID: PMC9300601 DOI: 10.1038/s41598-022-16587-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 07/12/2022] [Indexed: 11/12/2022] Open
Abstract
In this study, we proposed and demonstrated a circuit design for solving problems related to blue light leakage (e.g., eye damage) when phosphor-converted white light-emitting diodes (pcW-LEDs) overheat. This circuit only needs a positive thermal coefficient thermistor, resistor, and diodes in series and parallel; thus, it can easily be integrated into components. Simulations and corresponding experimental results show that this method can accurately suppress the overheating component’s injection current and allow for LEDs to work normally after returning to the operating temperature. It thus allows the user's eyes to be actively protected, e.g., to avoid exposure to the bluish light when overheating occurs. In addition, the quenching of luminous flux is a signal to remind the user to replace the LED. The proposed method is low-cost, effective, simple, and useful for increasing the quality of LED lighting and biological safety.
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Affiliation(s)
- Ching-Cherng Sun
- Department of Optics and Photonics, National Central University, ChungLi, 32001, Taiwan. .,Department of Electrophysics, National Yang Ming Chiao Tung University, HsinChu, 30010, Taiwan.
| | - Quang-Khoi Nguyen
- Department of Optics and Photonics, National Central University, ChungLi, 32001, Taiwan
| | - Tsung-Xian Lee
- Graduate Institute of Color & Illumination Technology, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan
| | - Shih-Kang Lin
- Department of Optics and Photonics, National Central University, ChungLi, 32001, Taiwan
| | - Chi-Shou Wu
- Department of Optics and Photonics, National Central University, ChungLi, 32001, Taiwan
| | - Tsung-Hsun Yang
- Department of Optics and Photonics, National Central University, ChungLi, 32001, Taiwan
| | - Yeh-Wei Yu
- Department of Optics and Photonics, National Central University, ChungLi, 32001, Taiwan
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Rebello LJ, Roberts AW, Fenuta AM, Cote AT, Bodner ME. Sleep Quality and Sleep Behaviors in Varsity Athletes: A Pilot Study. Front Sports Act Living 2022; 4:906663. [PMID: 35813053 PMCID: PMC9256907 DOI: 10.3389/fspor.2022.906663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 05/17/2022] [Indexed: 12/03/2022] Open
Abstract
Sleep hygiene practices may hinder university athletes from obtaining quality sleep to support health and performance. We sought to provide a comprehensive evaluation of sleep quality and behaviors in varsity athletes using validated sleep questionnaires: the Athlete Sleep Screening Questionnaire (ASSQ) and the Athlete Sleep Behavior Questionnaire (ASBQ). Sixty-four (n = 64) athletes participated (54% female; 71% Caucasian). The mean age was 20.3 ± 1.7 years and the mean BMI was 23.3 ± 3.3. Fifty-one percent met the threshold for adequate sleep (7+ h) and 54% reported being somewhat/very satisfied with sleep quality. Global scores for ASSQ Sleep Difficulty and ASBQ sleep behaviors were significantly correlated (r = 0.31; p = 0.014) and not significantly different across age, academic year, or residence. According to the ASSQ, 11% and 24% were classified as having severe or moderate sleep problems, respectively. The ASBQ categorized 62% as having “poor” sleep behaviors. Notable sleep-influencing factors included a high frequency of emotional/cognitive processing of sport-performance issues (46.9%), frequent use of light-emitting devices before bed (90%), training after 7 pm (65%), and the use of sleep medication (19%). Half of the university athletes did not meet the thresholds for adequate sleep, and some may require a referral for clinical sleep issues. The majority of these athletes' sleep behaviors do not promote adequate sleep. The ASSQ shows utility to assess gradations in clinical sleep difficulty; the ASBQ could be used in concert with the ASSQ to discern “cognitive and physiological arousal” targets for use in educational workshops designed to promote optimal sleep hygiene in university athletes.
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12
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Circadian Variation of Blood Pressure in Patients with Chronic Musculoskeletal Pain: A Cross-Sectional Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19116481. [PMID: 35682067 PMCID: PMC9180615 DOI: 10.3390/ijerph19116481] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/12/2022] [Accepted: 05/22/2022] [Indexed: 02/06/2023]
Abstract
The aim of this study was to analyze the impact of circadian variation of blood pressure (BP) in patients with chronic musculoskeletal pain (CPM). A further purpose was to study differences in circadian variation of BP between genders and the correlation between BP circadian variation and pain. We performed a cross-sectional, observational study in which seventy-five participants with CMP participated. Circadian variation in BP was calculated using the diurnal/nocturnal BP ratio, and all participants used validated self-measurement BP devices. The Numeric Pain Rating Scale was used to assess pain perception. All circadian BP values from participants who suffered from CPM followed pathologic cardiovascular parameters (BP ratio < 10%). When comparing BP ratios between genders, statistically significant differences were found (p = 0.011). BP itself did not correlate with pain in any subgroup. Circadian variations of BP in those suffering from CMP are shown and new possibilities of research and treatment are proposed.
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Liset R, Grønli J, Henriksen RE, Henriksen TEG, Nilsen RM, Pallesen S. A randomized controlled trial on the effect of blue-blocking glasses compared to partial blue-blockers on melatonin profile among nulliparous women in third trimester of the pregnancy. Neurobiol Sleep Circadian Rhythms 2022; 12:100074. [PMID: 35024497 PMCID: PMC8728098 DOI: 10.1016/j.nbscr.2021.100074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE In pregnancy melatonin regulates circadian rhythms, induce sleep, and has a neuroprotective positive effect on fetal development. Artificial blue light in the evening delays and suppresses melatonin production. Thus, we investigated the effect of blocking blue light on the melatonin profile. METHODS A randomized controlled trial (n=30 blue-blocking glasses vs. n=30 control glasses with partial blue-blocking effect) including healthy nulliparous pregnant women in the beginning of the third trimester. Salivary melatonin and subjective sleep were measured before and after two weeks of intervention/control condition. Saliva was sampled at 30-min intervals from 3 h before normal bedtime. Melatonin onset was set at 4.0 pg/ml. RESULTS Due to missing data melatonin onset was estimated for 47 participants. At posttreatment, melatonin onset advanced by 28 min in the blue-blocking group compared with the control condition (p=.019). Melatonin levels were significantly higher, favoring the blue-blocking glass condition, at clock time 20:00, 21:00 and 22:00 h, and for sample number 3 and 4. The phase angle (time interval) between melatonin onset and sleep bedtime and sleep onset time increased within the blue blocking group (+45 min and +41 min, respectively), but did not reach statistical significance compared to control condition (+13 min and +26 min, respectively). CONCLUSION Blocking blue light in the evening had a positive effect on the circadian system with an earlier onset and rise of melatonin levels in healthy nulliparous pregnant women. This demonstrated the effectiveness and feasibility of a simple non-pharmacological chronobiological intervention during pregnancy.
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Affiliation(s)
- Randi Liset
- Department of Psychosocial Science, Faculty of Psychology, University of Bergen, Bergen, Norway
| | - Janne Grønli
- Department of Biological and Medical Psychology, Faculty of Psychology, University of Bergen, Bergen, Norway
| | - Roger Ekeberg Henriksen
- Faculty of Health and Social Sciences, Western Norway University of Applied Sciences, Bergen, Norway
| | | | - Roy Miodini Nilsen
- Faculty of Health and Social Sciences, Western Norway University of Applied Sciences, Bergen, Norway
| | - Ståle Pallesen
- Department of Psychosocial Science, Faculty of Psychology, University of Bergen, Bergen, Norway
- Norwegian Competence Center for Sleep Disorders, Haukeland University Hospital, Bergen, Norway
- Optentia, The Vaal Triangle Campus of the North-West University, Vanderbijlpark, South Africa
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14
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Han T, Wang W, Kuroda Y, Mizuno M. The Relationships of Sleep Duration and Inconsistency With the Athletic Performance of Collegiate Soft Tennis Players. Front Psychol 2022; 13:791805. [PMID: 35401355 PMCID: PMC8988183 DOI: 10.3389/fpsyg.2022.791805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 02/10/2022] [Indexed: 11/13/2022] Open
Abstract
We evaluated the relationships of daily sleep duration and inconsistency with soft tennis competitive performance among 15 healthy collegiate soft tennis players (13 male, 2 female, mean age = 19.7 ± 0.8 years, height = 170.8 ± 7.3 cm, weight = 60.3 ± 5.6 kg, soft tennis experience = 8.7 ± 2.0 years). Sleep duration and inconsistency were determined by a 50-day sleep diary, which recorded sleep and wake times of sleep. Soft tennis athletic performance was evaluated by a service and baseline stroke accuracy test and the spider run test. Mean sleep duration was 7.4 ± 1.7 h. No correlation was found between long-term mean sleep duration and athletic performance. But inconsistency in sleep duration (SD of sleep duration) was inversely correlated with service score after controlling for soft tennis experience and sex (r = −0.56, p = 0.046). There was no significant relationship between sleep inconsistency and other athletic performance. This result indicates that reducing the instability of sleep duration (i.e., sleep regular hours) in the long-term may have a positive effect on soft tennis players’ service performance. Although participants’ current mean sleep duration (7.4 h) was not as sufficient as the recommendation in sleep extension experiments (9–10 h), it revealed the importance for athletes to maintain regular sleep in daily life.
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Affiliation(s)
- Tianfang Han
- Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan
- Graduate School of Education, Hokkaido University, Sapporo, Japan
- *Correspondence: Tianfang Han,
| | - Wenjuan Wang
- Graduate School of Education, Hokkaido University, Sapporo, Japan
| | - Yuta Kuroda
- Department of Sport Education, Hokusho University, Ebetsu, Japan
| | - Masao Mizuno
- Faculty of Education, Hokkaido University, Sapporo, Japan
- Faculty of Health and Medical Care, Hachinohe Gakuin University, Hachinohe, Japan
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15
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Rosa JPP, Gentil P, Knechtle B, Vancini RL, Campos MH, Vieira CA, Andrade MS, de Lira CAB. Technology and Sleep Quality: Friend or Foe? Let the Exergames Come into Play! Int J Sports Med 2022; 43:768-772. [PMID: 35315004 DOI: 10.1055/a-1756-5005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Low sleep quality is associated with many health problems. Although physical exercise is a nonpharmacological tool that positively impacts sleep quality, there are many barriers (lack of energy, lack of motivation, lack of skills, lack of resources, and fear of injury) for people to adopt an active lifestyle. Exergames are an alternative way of physical exercise that are funnier and more attractive than traditional forms of physical exercise and, therefore, has the potential to increase adherence to a physical exercise program. Given that previous studies showed that exergames presents similar physiological and psychological outcomes to traditional forms of exercise, we aimed to discuss in this narrative review potentials applications, limitations and perspectives of using exergames to improve sleep quality.
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Affiliation(s)
- João Paulo Pereira Rosa
- Faculdade Educação Física e Dança, Universidade Federal de Goias - Campus Samambaia, Goiania, Brazil
| | - Paulo Gentil
- Faculdade Educação Física e Dança, Universidade Federal de Goias - Campus Samambaia, Goiania, Brazil
| | - Beat Knechtle
- Medbase St. Gallen Am Vadianplatz, St. Gallen, Switzerland.,Institute of Primary Care, University of Zurich, Zurich, Switzerland
| | - Rodrigo Luiz Vancini
- Centro de Educação Física e Desportos, Universidade Federal do Espírito Santo, Vitória, Brazil
| | - Mário Hebling Campos
- Faculdade Educação Física e Dança, Universidade Federal de Goias - Campus Samambaia, Goiania, Brazil
| | - Carlos Alexendre Vieira
- Faculdade Educação Física e Dança, Universidade Federal de Goias - Campus Samambaia, Goiania, Brazil
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16
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Liset R, Grønli J, Henriksen RE, Henriksen TEG, Nilsen RM, Pallesen S. A randomized controlled trial on the effects of blue-blocking glasses compared to partial blue-blockers on sleep outcomes in the third trimester of pregnancy. PLoS One 2022; 17:e0262799. [PMID: 35089982 PMCID: PMC8797219 DOI: 10.1371/journal.pone.0262799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 12/15/2021] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE Sleep disturbances are common in pregnancy. Blocking blue light has been shown to improve sleep and may be a suitable intervention for sleep problems during pregnancy. The present study investigated the effects of blue light blocking in the evening and during nocturnal awakenings among pregnant women on primary sleep outcomes in terms of total sleep time, sleep efficiency and mid-point of sleep. METHODS In a double-blind randomized controlled trial, 60 healthy nulliparous pregnant women in the beginning of the third trimester were included. They were randomized, using a random number generator, either to a blue-blocking glass intervention (n = 30) or to a control glass condition constituting partial blue-blocking effect (n = 30). Baseline data were recorded for one week and outcomes were recorded in the last of two intervention/control weeks. Sleep was measured by actigraphy, sleep diaries, the Bergen Insomnia Scale, the Karolinska Sleepiness Scale and the Pre-Sleep Arousal Scale. RESULTS The results on the primary outcomes showed no significant mean difference between the groups at posttreatment, neither when assessed with sleep diary; total sleep time (difference = .78[min], 95%CI = -19.7, 21.3), midpoint of sleep (difference = -8.9[min], 95%CI = -23.7, 5.9), sleep efficiency (difference = -.06[%], 95%CI = -1.9, 1.8) and daytime functioning (difference = -.05[score points], 95%CI = -.33, .22), nor by actigraphy; total sleep time (difference = 13.0[min], 95%CI = -9.5, 35.5), midpoint of sleep (difference = 2.1[min], 95%CI = -11.6, 15.8) and sleep efficiency (difference = 1.7[%], 95%CI = -.4, 3.7). On the secondary outcomes, the Bergen Insomnia Scale, the Karolinska Sleepiness Scale and the Pre-Sleep Arousal Scale the blue-blocking glasses no statistically significant difference between the groups were found. Transient side-effects were reported in both groups (n = 3). CONCLUSIONS The use of blue-blocking glasses compared to partially blue-blocking glasses in a group of healthy pregnant participants did not show statistically significant effects on sleep outcomes. Research on the effects of blue-blocking glasses for pregnant women with sleep-problems or circadian disturbances is warranted. TRIAL REGISTRATION The trial is registered at ClinicalTrials.gov (NCT03114072).
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Affiliation(s)
- Randi Liset
- Department of Psychosocial Science, Faculty of Psychology, University of Bergen, Bergen, Norway
| | - Janne Grønli
- Department of Biological and Medical Psychology, Faculty of Psychology, University of Bergen, Bergen, Norway
| | - Roger E. Henriksen
- Faculty of Health and Social Sciences, Western Norway University of Applied Sciences, Bergen, Norway
| | - Tone E. G. Henriksen
- Division of Mental Health Care, Fonna Local Health Authority, Valen Hospital, Valen, Norway
| | - Roy M. Nilsen
- Faculty of Health and Social Sciences, Western Norway University of Applied Sciences, Bergen, Norway
| | - Ståle Pallesen
- Department of Psychosocial Science, Faculty of Psychology, University of Bergen, Bergen, Norway
- Norwegian Competence Center for Sleep Disorders, Haukeland University Hospital, Bergen, Norway
- Optentia, The Vaal Triangle Campus of The North-West University, Vanderbijlpark, South-Africa
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Virtual dark therapy by use of Amber Lenses: Potential outpatient use in clients with high functioning Bipolar I disorder a case report. ADVANCES IN INTEGRATIVE MEDICINE 2021. [DOI: 10.1016/j.aimed.2021.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Cable J, Schernhammer E, Hanlon EC, Vetter C, Cedernaes J, Makarem N, Dashti HS, Shechter A, Depner C, Ingiosi A, Blume C, Tan X, Gottlieb E, Benedict C, Van Cauter E, St-Onge MP. Sleep and circadian rhythms: pillars of health-a Keystone Symposia report. Ann N Y Acad Sci 2021; 1506:18-34. [PMID: 34341993 PMCID: PMC8688158 DOI: 10.1111/nyas.14661] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 06/21/2021] [Indexed: 12/24/2022]
Abstract
The human circadian system consists of the master clock in the suprachiasmatic nuclei of the hypothalamus as well as in peripheral molecular clocks located in organs throughout the body. This system plays a major role in the temporal organization of biological and physiological processes, such as body temperature, blood pressure, hormone secretion, gene expression, and immune functions, which all manifest consistent diurnal patterns. Many facets of modern life, such as work schedules, travel, and social activities, can lead to sleep/wake and eating schedules that are misaligned relative to the biological clock. This misalignment can disrupt and impair physiological and psychological parameters that may ultimately put people at higher risk for chronic diseases like cancer, cardiovascular disease, and other metabolic disorders. Understanding the mechanisms that regulate sleep circadian rhythms may ultimately lead to insights on behavioral interventions that can lower the risk of these diseases. On February 25, 2021, experts in sleep, circadian rhythms, and chronobiology met virtually for the Keystone eSymposium "Sleep & Circadian Rhythms: Pillars of Health" to discuss the latest research for understanding the bidirectional relationships between sleep, circadian rhythms, and health and disease.
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Affiliation(s)
| | - Eva Schernhammer
- Department of Epidemiology, Center for Public Health, Medical University of Vienna, Vienna, Austria
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, and Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Erin C Hanlon
- Department of Medicine, Section of Endocrinology, Diabetes and Metabolism, University of Chicago, Chicago, Illinois
| | - Céline Vetter
- Department of Integrative Physiology, University of Colorado at Boulder, Boulder, Colorado
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Jonathan Cedernaes
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Nour Makarem
- Department of Epidemiology, Mailman School of Public Health, Columbia University Irving Medical Center, New York, New York
| | - Hassan S Dashti
- Department of Integrative Physiology, University of Colorado at Boulder, Boulder, Colorado
- Center for Genomic Medicine, Massachusetts General Hospital, and Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Ari Shechter
- Department of Medicine and Sleep Center of Excellence, Columbia University Irving Medical Center, New York, New York
| | - Christopher Depner
- Department of Health and Kinesiology, University of Utah, Salt Lake City, Utah
| | - Ashley Ingiosi
- Department of Biomedical Sciences, Elson S. Floyd College of Medicine, Washington State University, Spokane, Washington
| | - Christine Blume
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, and Transfaculty Research Platform Molecular and Cognitive Neurosciences, University of Basel, Basel, Switzerland
| | - Xiao Tan
- Department of Neuroscience (Sleep Science, BMC), Uppsala University, Uppsala, Sweden
- Department of Clinical Neuroscience, Karolinska Institutet, Solna, Sweden
| | - Elie Gottlieb
- The Florey Institute of Neuroscience and Mental Health, and University of Melbourne, Melbourne, Victoria, Australia
| | - Christian Benedict
- Department of Neuroscience (Sleep Science, BMC), Uppsala University, Uppsala, Sweden
| | - Eve Van Cauter
- Department of Medicine, Section of Endocrinology, Diabetes and Metabolism, University of Chicago, Chicago, Illinois
| | - Marie-Pierre St-Onge
- Sleep Center of Excellence, Columbia University Irving Medical Center, New York, New York
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Johnson DA, Jackson CL, Guo N, Sofer T, Laden F, Redline S. Perceived home sleep environment: associations of household-level factors and in-bed behaviors with actigraphy-based sleep duration and continuity in the Jackson Heart Sleep Study. Sleep 2021; 44:zsab163. [PMID: 34283244 PMCID: PMC8678916 DOI: 10.1093/sleep/zsab163] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 06/09/2021] [Indexed: 11/13/2022] Open
Abstract
STUDY OBJECTIVES In an older African-American sample (n = 231) we tested associations of the household environment and in-bed behaviors with sleep duration, efficiency, and wakefulness after sleep onset (WASO). METHODS Older adult participants completed a household-level sleep environment questionnaire, a sleep questionnaire, and underwent 7-day wrist actigraphy for objective measures of sleep. Perceived household environment (self-reported) was evaluated using questions regarding safety, physical comfort, temperature, noise, and light disturbances. In-bed behaviors included watching television, listening to radio/music, use of computer/tablet/phone, playing video games, reading books, and eating. To estimate the combined effect of the components in each domain (perceived household environment and in-bed behaviors), we calculated and standardized a weighted score per sleep outcome (e.g. duration, efficiency, WASO), with a higher score indicating worse conditions. The weights were derived from the coefficients of each component estimated from linear regression models predicting each sleep outcome while adjusting for covariates. RESULTS A standard deviation increase in an adverse household environment score was associated with lower self-reported sleep duration (β = -13.9 min, 95% confidence interval: -26.1, -1.7) and actigraphy-based sleep efficiency (β = -0.7%, -1.4, 0.0). A standard deviation increase in the in-bed behaviors score was associated with lower actigraphy-based sleep duration (β = -9.7 min, -18.0, -1.3), sleep efficiency (β = -1.2%, -1.9, -0.6), and higher WASO (5.3 min, 2.1, 8.6). CONCLUSION Intervening on the sleep environment, including healthy sleep practices, may improve sleep duration and continuity among African-Americans.
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Affiliation(s)
- Dayna A Johnson
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Boston, MA, USA
| | - Chandra L Jackson
- Department of Health and Human Services, Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Triangle Park, NC, USA
- Intramural Program, Department of Health and Human Services, National Institute on Minority Health and Health Disparities, National Institutes of Health, Bethesda, MD, USA
| | - Na Guo
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Boston, MA, USA
| | - Tamar Sofer
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Boston, MA, USA
- Division of Sleep Medicine, Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Francine Laden
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
- Exposure, Epidemiology and Risk Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Susan Redline
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Boston, MA, USA
- Division of Sleep Medicine, Department of Medicine, Harvard Medical School, Boston, MA, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
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20
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Crouse JJ, Carpenter JS, Song YJC, Hockey SJ, Naismith SL, Grunstein RR, Scott EM, Merikangas KR, Scott J, Hickie IB. Circadian rhythm sleep-wake disturbances and depression in young people: implications for prevention and early intervention. Lancet Psychiatry 2021; 8:813-823. [PMID: 34419186 DOI: 10.1016/s2215-0366(21)00034-1] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 01/19/2021] [Accepted: 01/21/2021] [Indexed: 12/19/2022]
Abstract
A rate-limiting step in the prevention and early intervention of depressive disorders in young people is our insufficient understanding of causal mechanisms. One plausible pathophysiological pathway is disturbance in the 24 h sleep-wake cycle and the underlying circadian system. Abnormalities in circadian rhythms are well documented in adults with various depressive disorders and have been linked to core clinical features, including unstable mood, daytime fatigue, non-restorative sleep, reduced motor activity, somatic symptoms, and appetite and weight change. In this Review, we summarise four areas of research: basic circadian biology and animal models of circadian disturbances; developmental changes in circadian rhythms during adolescence and implications for the emergence of adolescent-onset depressive syndromes; community and clinical studies linking 24 h sleep-wake cycle disturbances and depressive disorders; and clinical trials of circadian-based treatments. We present recommendations based on a highly personalised, early intervention model for circadian-linked depression in young people.
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Affiliation(s)
- Jacob J Crouse
- Youth Mental Health and Technology Team, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia.
| | - Joanne S Carpenter
- Youth Mental Health and Technology Team, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia
| | - Yun Ju C Song
- Youth Mental Health and Technology Team, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia
| | - Samuel J Hockey
- Youth Mental Health and Technology Team, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia
| | - Sharon L Naismith
- Healthy Brain Ageing Program, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia
| | - Ronald R Grunstein
- Woolcock Institute of Medical Research, Sleep and Circadian Research Group, Sydney, NSW, Australia
| | - Elizabeth M Scott
- St Vincent's and Mater Clinical School, The University of Notre Dame, Sydney, NSW, Australia
| | - Kathleen R Merikangas
- Genetic Epidemiology Research Branch, Division of Intramural Research Program, National Institute of Mental Health, Bethesda, MD, USA
| | - Jan Scott
- Academic Psychiatry, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
| | - Ian B Hickie
- Youth Mental Health and Technology Team, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia
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21
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Lou L, Arumugam B, Hung LF, She Z, Beach KM, Smith EL, Ostrin LA. Long-Term Narrowband Lighting Influences Activity but Not Intrinsically Photosensitive Retinal Ganglion Cell-Driven Pupil Responses. Front Physiol 2021; 12:711525. [PMID: 34393828 PMCID: PMC8358670 DOI: 10.3389/fphys.2021.711525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 07/05/2021] [Indexed: 01/30/2023] Open
Abstract
Purpose: Light affects a variety of non-image forming processes, such as circadian rhythm entrainment and the pupillary light reflex, which are mediated by intrinsically photosensitive retinal ganglion cells (ipRGCs). The purpose of this study was to assess the effects of long- and short-wavelength ambient lighting on activity patterns and pupil responses in rhesus monkeys. Methods: Infant rhesus monkeys were reared under either broadband "white" light (n = 14), long-wavelength "red" light (n = 20; 630 nm), or short-wavelength "blue" light (n = 21; 465 nm) on a 12-h light/dark cycle starting at 24.1 ± 2.6 days of age. Activity was measured for the first 4 months of the experimental period using a Fitbit activity tracking device and quantified as average step counts during the daytime (lights-on) and nighttime (lights-off) periods. Pupil responses to 1 s red (651 nm) and blue (456 nm) stimuli were measured after approximately 8 months. Pupil metrics included maximum constriction and the 6 s post-illumination pupil response (PIPR). Results: Activity during the lights-on period increased with age during the first 10 weeks (p < 0.001 for all) and was not significantly different for monkeys reared in white, red, or blue light (p = 0.07). Activity during the 12-h lights-off period was significantly greater for monkeys reared in blue light compared to those in white light (p = 0.02), but not compared to those in red light (p = 0.08). However, blue light reared monkeys exhibited significantly lower activity compared to both white and red light reared monkeys during the first hour of the lights-off period (p = 0.01 for both) and greater activity during the final hour of the lights-off period (p < 0.001 for both). Maximum pupil constriction and the 6 s PIPR to 1 s red and blue stimuli were not significantly different between groups (p > 0.05 for all). Conclusion: Findings suggest that long-term exposure to 12-h narrowband blue light results in greater disruption in nighttime behavioral patterns compared to narrowband red light. Normal pupil responses measured later in the rearing period suggest that ipRGCs adapt after long-term exposure to narrowband lighting.
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Affiliation(s)
- Linjiang Lou
- College of Optometry, University of Houston, Houston, TX, United States
| | - Baskar Arumugam
- College of Optometry, University of Houston, Houston, TX, United States
| | - Li-Fang Hung
- College of Optometry, University of Houston, Houston, TX, United States,Brien Holden Vision Institute, Sydney, NSW, Australia
| | - Zhihui She
- College of Optometry, University of Houston, Houston, TX, United States
| | - Krista M. Beach
- College of Optometry, University of Houston, Houston, TX, United States
| | - Earl L. Smith
- College of Optometry, University of Houston, Houston, TX, United States,Brien Holden Vision Institute, Sydney, NSW, Australia
| | - Lisa A. Ostrin
- College of Optometry, University of Houston, Houston, TX, United States,*Correspondence: Lisa A. Ostrin,
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22
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Parmar KR, Porter CS, Dickinson CM, Pelham J, Baimbridge P, Gowen E. Visual Sensory Experiences From the Viewpoint of Autistic Adults. Front Psychol 2021; 12:633037. [PMID: 34168586 PMCID: PMC8217662 DOI: 10.3389/fpsyg.2021.633037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 05/10/2021] [Indexed: 11/13/2022] Open
Abstract
Although previous research has investigated altered sensory reactivity in autistic individuals, there has been no specific focus on visual sensory experiences, particularly in adults. Using qualitative methods, this study aimed to characterize autistic visual sensory symptoms, contextualize their impact and document any associated coping strategies. A total of 18 autistic adults took part in four focus groups which involved questions around visual experiences, the impact of these on daily life, and strategies for their reduction. Transcripts of each session were thematically analyzed allocating six key themes. Participants described a range of visual hypersensitivities, including to light, motion, patterns and particular colors, which contributed to distraction and were frequently part of a wider multisensory issue. Such experiences had significant negative impacts on personal wellbeing and daily life with participants describing fatigue, stress and hindrances on day-to-day activities (e.g., travel and social activities). However, the degree of understanding that participants had about their visual experiences influenced their emotional response, with greater understanding reducing concern. Participants employed a variety of coping strategies to overcome visual sensory experiences but with varied success. Discussions also highlighted that there may be a poor public understanding of sensory issues in autism affecting how well autistic individuals are able manage their sensory symptoms. In summary, autistic adults expressed significant concern about their visual experiences and there is a need to improve understanding of visual experiences on a personal and public level as well as for developing potential support.
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Affiliation(s)
- Ketan R Parmar
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, United Kingdom
| | - Catherine S Porter
- Division of Pharmacy and Optometry, School of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, United Kingdom
| | - Christine M Dickinson
- Division of Pharmacy and Optometry, School of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, United Kingdom
| | - James Pelham
- Greater Manchester Autism Consortium, Manchester, United Kingdom.,Autscape, Coventry, United Kingdom.,Autism@Manchester, Manchester, United Kingdom
| | - Peter Baimbridge
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, United Kingdom.,Autism@Manchester, Manchester, United Kingdom.,Salfordautism, Manchester, United Kingdom
| | - Emma Gowen
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, United Kingdom
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23
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Salfi F, Amicucci G, Corigliano D, D'Atri A, Viselli L, Tempesta D, Ferrara M. Changes of evening exposure to electronic devices during the COVID-19 lockdown affect the time course of sleep disturbances. Sleep 2021; 44:6270772. [PMID: 34037792 PMCID: PMC8194574 DOI: 10.1093/sleep/zsab080] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 03/11/2021] [Indexed: 12/23/2022] Open
Abstract
STUDY OBJECTIVES During the coronavirus disease 2019 (COVID-19) lockdown, there was a worldwide increase in electronic devices' daily usage. Prolonged exposure to backlit screens before sleep influences the circadian system leading to negative consequences on sleep health. We investigated the relationship between changes in evening screen exposure and the time course of sleep disturbances during the home confinement period due to COVID-19. METHODS 2,123 Italians (mean age ± standard deviation, 33.1 ± 11.6) were tested longitudinally during the third and the seventh week of lockdown. The web-based survey evaluated sleep quality and insomnia symptoms through the Pittsburgh Sleep Quality Index and the Insomnia Severity Index. The second assessment survey inquired about intervening changes in backlit screen exposure in the two hours before falling asleep. RESULTS Participants who increased electronic device usage showed decreased sleep quality, exacerbated insomnia symptoms, reduced sleep duration, prolonged sleep onset latency, and delayed bedtime and rising time. In this subgroup, the prevalence of poor sleepers and individuals reporting moderate/severe insomnia symptoms increased. Conversely, respondents reporting decreased screen exposure exhibited improved sleep quality and insomnia symptoms. In this subgroup, the prevalence of poor sleepers and moderate/severe insomniacs decreased. Respondents preserving screen time habits did not show variations of the sleep parameters. CONCLUSIONS Our investigation demonstrated a strong relationship between modifications of evening electronic device usage and time course of sleep disturbances during the lockdown period. Monitoring the potential impact of excessive evening exposure to backlit screens on sleep health is recommendable during the current period of restraining measures due to COVID-19.
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Affiliation(s)
- Federico Salfi
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Giulia Amicucci
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy.,Department of Psychology, Sapienza University of Rome, Rome, Italy
| | - Domenico Corigliano
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Aurora D'Atri
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Lorenzo Viselli
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Daniela Tempesta
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Michele Ferrara
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
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24
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Hester L, Dang D, Barker CJ, Heath M, Mesiya S, Tienabeso T, Watson K. Evening wear of blue-blocking glasses for sleep and mood disorders: a systematic review. Chronobiol Int 2021; 38:1375-1383. [PMID: 34030534 DOI: 10.1080/07420528.2021.1930029] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Blue-blocking glasses, also known as amber glasses, are plastic glasses that primarily block blue light. Blue-blocking glasses have been studied as a sleep intervention for insomnia, delayed sleep-phase disorder, shift work, jet lag, and nonpathologic sleep improvement. Blue-blocking glasses have also been studied as a treatment for bipolar disorder, major depression, and postpartum depression. Blue-blocking glasses improve sleep by inducing dim-light melatonin onset by reducing activation of intrinsically photosensitive retinal ganglion cells (ipRGCs) which are most sensitive to blue light and are a major input for circadian regulation; their mechanism for mood regulation is unclear but may be similar to that of dark therapy for bipolar disorder where patients are kept in darkness for an extended period every night. A systematic search of the scientific literature identified a total of 29 experimental publications involving evening wear of blue-blocking glasses for sleep or mood disorders. These consisted of 16 randomized controlled trials (RCTs) published in journals with a total of 453 patients, 5 uncontrolled trials, 1 case series, 1 case study, and 6 abstracts from conference proceedings. Only 1 case study and 1 RCT were for acutely manic patients but both found substantial decreases in manic symptoms with the use of blue-blocking glasses; these give preliminary clinical evidence of efficacy that makes blue-blocking glasses a high-yield intervention to study for bipolar disorder. Findings in the 3 publications for major depression and postpartum depression were heterogeneous and conflicting as to their efficacy. Out of the 24 publications focusing on sleep, there was substantial evidence for blue-blocking glasses being a successful intervention for reducing sleep onset latency in patients with sleep disorders, jet lag, or variable shift work schedules. Given the well-established biological mechanism and clinical research showing that blue-blocking glasses are effective for inducing sleep, they are a viable intervention to recommend to patients with insomnia or a delayed sleep phase.
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Affiliation(s)
- Landon Hester
- Department of Psychiatry and Behavioral Sciences, University of Oklahoma College of Medicine, Oklahoma City, Oklahoma, USA
| | - Deanna Dang
- Department of Psychiatry and Behavioral Sciences, University of Oklahoma College of Medicine, Oklahoma City, Oklahoma, USA
| | - Christopher J Barker
- Department of Psychiatry and Behavioral Sciences, University of Oklahoma College of Medicine, Oklahoma City, Oklahoma, USA
| | - Michael Heath
- Department of Psychiatry and Behavioral Sciences, University of Oklahoma College of Medicine, Oklahoma City, Oklahoma, USA
| | - Sidra Mesiya
- Department of Psychiatry and Behavioral Sciences, University of Oklahoma College of Medicine, Oklahoma City, Oklahoma, USA
| | - Tekenari Tienabeso
- Department of Psychiatry and Behavioral Sciences, University of Oklahoma College of Medicine, Oklahoma City, Oklahoma, USA
| | - Kevin Watson
- Department of Psychiatry and Behavioral Sciences, University of Oklahoma College of Medicine, Oklahoma City, Oklahoma, USA
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25
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Napoli PE, Nioi M, Fossarello M. The "Quarantine Dry Eye": The Lockdown for Coronavirus Disease 2019 and Its Implications for Ocular Surface Health. Risk Manag Healthc Policy 2021; 14:1629-1636. [PMID: 33907480 PMCID: PMC8064711 DOI: 10.2147/rmhp.s277067] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 10/01/2020] [Indexed: 12/12/2022] Open
Abstract
The pandemic of coronavirus disease 2019 (COVID-19) has led many countries of the world to impose a series of containment measures such as lockdowns (mass quarantines), curfews or similar restrictions (eg, stay-at-home orders, or shelter-in-place orders). All these restrictions were established in order to limit spread of COVID-19. Thus, approximately 3.9 billion people worldwide were under lockdown by early April 2020. During this time (home confinement), some solutions have been proposed by experts to improve work and school productivity, including smart working and online school lessons. However, many of the restrictive measures are likely to act as predisposing factors for dry eye disease (DED), directly or related to sick building syndrome (SBS). Herein, we discuss the implications of quarantine measures on eye health, in particular on DED associated with SBS, and introduce some potential preventive strategies for lockdown-related ocular surface disorders. Several risk factors are implicated in their pathogenesis, including environmental changes (eg, air quality) and modifications in personal behaviors (eg, the abuse of digital devices, malnutrition, and sleep/psychiatric disorders). Considering a number of predisposing factors for DED, it is possible to state that patients under lockdown are at risk of ocular surface alterations. Accordingly, the COVID-19 pandemic era is expected to determine an increase in dry eye patients all around the world (a new phenomenon that we propose to name the "quarantine dry eye") in the event that the restrictive measures will be recursively extended over time.
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Affiliation(s)
| | - Matteo Nioi
- Department of Clinical Sciences and Public Health, University of Cagliari, Forensic Medicine Unit, Cagliari, Italy
| | - Maurizio Fossarello
- Department of Surgical Science, University of Cagliari, Eye Clinic, Cagliari, Italy
- Clinica Oculistica, San Giovanni di Dio Hospital, Azienda Ospedaliera Universitaria di Cagliari, Cagliari, Italy
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26
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Duraccio KM, Zaugg KK, Blackburn RC, Jensen CD. Does iPhone night shift mitigate negative effects of smartphone use on sleep outcomes in emerging adults? Sleep Health 2021; 7:478-484. [PMID: 33867308 DOI: 10.1016/j.sleh.2021.03.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 02/02/2021] [Accepted: 03/08/2021] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Apple's iPhone Night Shift feature purports to reduce short-wavelength light emissions and improve sleep. We aimed to investigate these claims by comparing emerging adults' sleep outcomes associated with smartphone use before bed with iPhone's Night Shift enabled to two comparison conditions (iPhone use with no Night Shift, no iPhone use). DESIGN Participants were randomly assigned to one of three conditions specifying iPhone use during the hour preceding bedtime for seven consecutive nights: iPhone use with Night Shift enabled; iPhone use with Night Shift disabled; and no phone use. SETTING Participants were recruited from a western undergraduate university. PARTICIPANTS A sample of 167 emerging adults (ages 18-24; 71.3% female) with iPhones participated in the study. MEASUREMENTS Sleep outcomes (sleep latency, duration, efficiency and wake after sleep onset) were tracked using wrist-worn accelerometers. RESULTS There were no significant differences in sleep outcomes across the three experimental groups. Post-hoc exploratory stratified analyses revealed a significant main effect of phone condition on sleep efficiency (P = .014) and WASO (P = .013) for participants averaging more than 6.8 hours of sleep per night, with the no phone condition demonstrating the best sleep outcomes. For those averaging less than 6.8 hours of sleep, there was no effect of phone condition on sleep outcomes. CONCLUSIONS Across our full study sample, there were no differences in sleep outcomes attributable to Night Shift. For individuals who regularly obtained adequate sleep, abstaining from screen use resulted in better quality sleep than did phone use with Night Shift enabled.
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Affiliation(s)
- Kara M Duraccio
- Department of Behavioral Medicine and Clinical Psychology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.
| | - Kelsey K Zaugg
- Department of Psychology, Brigham Young University, Provo, Utah, USA
| | - Robyn C Blackburn
- Department of Psychology, Brigham Young University, Provo, Utah, USA
| | - Chad D Jensen
- Department of Psychology, Brigham Young University, Provo, Utah, USA
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27
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Alzahrani HS, Khuu SK, Roy M. Modelling the effect of commercially available blue‐blocking lenses on visual and non‐visual functions. Clin Exp Optom 2021; 103:339-346. [DOI: 10.1111/cxo.12959] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 07/18/2019] [Accepted: 07/25/2019] [Indexed: 12/16/2022] Open
Affiliation(s)
- Hind S Alzahrani
- School of Optometry and Vision Science, The University of New South Wales, Sydney, Australia,
| | - Sieu K Khuu
- School of Optometry and Vision Science, The University of New South Wales, Sydney, Australia,
| | - Maitreyee Roy
- School of Optometry and Vision Science, The University of New South Wales, Sydney, Australia,
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28
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Alzahrani HS, Khuu SK, Roy M. Modelling the effect of light through commercially available blue-blocking lenses on the human circadian system. Clin Exp Optom 2021; 105:275-280. [PMID: 33779493 DOI: 10.1080/08164622.2021.1898276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
CLINICAL RELEVANCE Wearing blue-blocking lenses (BBLs) in the evening hours may not be effective in improving sleep quality. Optometrists need to be informed in prescribing BBLs by highlighting the consequences of their wear to the circadian system. BACKGROUND Excessive exposure to artificial light, particularly at short wavelengths, during the evening, may disrupt normal nocturnal melatonin production, which is a natural process of the circadian rhythm and affect sleep quality. Current BBLs have been designed to limit blue-light exposure and may offer a means to minimise disruption to the circadian system. The purpose of this study was to evaluate the impact of BBLs on a normal sleep-wake circadian rhythm. METHODS Seven different commercial brands of BBLs (Crizal Prevencia, Smart Blue Filter, Blu-OLP, Blue Control, UV++Blue Control, SeeCoat Blue UV and Blue Guardian) and powers (+2.00 D, -2.00 D and Plano) were evaluated by quantifying the degree to which they reduce light radiation from lamps and electronic devices. In particular, the non-linear circadian index and the circadian stimulus was determined for various light sources to establish changes in melatonin production that occur while viewing through different BBLs. RESULTS A large difference was shown in the effectiveness of different BBL brands in reducing the spectral sensitivity of the circadian system. The BBL brand was shown to selectively affect the non-linear circadian index and circadian stimulus, particularly with those with transmittance profiles that block the most blue light having the lowest effect on the suppression of nocturnal melatonin secretion. CONCLUSION BBLs may not improve sleep quality, because they continue to allow the transmittance of blue light that may suppress nocturnal melatonin secretion and hence disrupt the normal sleep-wake circadian rhythm.
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Affiliation(s)
- Hind Saeed Alzahrani
- School of Optometry and Vision Science, The University of New South Wales, Sydney, Australia.,Department of Physics, Taif University, Ta'if, Saudi Arabia
| | - Sieu K Khuu
- School of Optometry and Vision Science, The University of New South Wales, Sydney, Australia
| | - Maitreyee Roy
- School of Optometry and Vision Science, The University of New South Wales, Sydney, Australia
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29
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Vagge A, Ferro Desideri L, Del Noce C, Di Mola I, Sindaco D, Traverso CE. Blue light filtering ophthalmic lenses: A systematic review. Semin Ophthalmol 2021; 36:541-548. [PMID: 33734926 DOI: 10.1080/08820538.2021.1900283] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Background: Blue blocking (BB) lenses, including spectacles and intraocular lenses, work by attenuating short-wavelength light. BB glasses are being marketed with the aim to reduce eye fatigue symptoms when using digital devices, improve sleep quality and potentially confer protection from retinal phototoxicity. BB intraocular lenses following cataract surgery may be implanted because they are thought to prevent age-related macular degeneration (AMD) progression.Methods: The present study is a systematic review aiming to analyze BB lenses clinical efficacy in preventing blue light-related ocular disorders, including AMD progression, eye fatigue, and their impact on sleep quality. We searched Medline, PubMed, Web of Science and the Cochrane Library until May 2020.Results:Although several studies have been performed investigating BB lenses, clinical efficacy for preventing or attenuating the above-mentioned ocular disorders is often theorical or based on laboratory or animal experiments. Conclusions: To date, there is a lack of consistent evidence for a larger-sclale introduction of BB lenses in the routine clinical practice.
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Affiliation(s)
- Aldo Vagge
- IRCCS Polyclinic Hospital San Martino, Genoa, Italy.,Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (Dinogmi), University of Genoa, Italy
| | - Lorenzo Ferro Desideri
- IRCCS Polyclinic Hospital San Martino, Genoa, Italy.,Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (Dinogmi), University of Genoa, Italy
| | - Chiara Del Noce
- IRCCS Polyclinic Hospital San Martino, Genoa, Italy.,Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (Dinogmi), University of Genoa, Italy
| | - Ilaria Di Mola
- IRCCS Polyclinic Hospital San Martino, Genoa, Italy.,Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (Dinogmi), University of Genoa, Italy
| | - Daniele Sindaco
- IRCCS Polyclinic Hospital San Martino, Genoa, Italy.,Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (Dinogmi), University of Genoa, Italy
| | - Carlo E Traverso
- IRCCS Polyclinic Hospital San Martino, Genoa, Italy.,Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (Dinogmi), University of Genoa, Italy
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30
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Bigalke JA, Greenlund IM, Nicevski JR, Carter JR. Effect of evening blue light blocking glasses on subjective and objective sleep in healthy adults: A randomized control trial. Sleep Health 2021; 7:485-490. [PMID: 33707105 DOI: 10.1016/j.sleh.2021.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 02/01/2021] [Accepted: 02/08/2021] [Indexed: 02/03/2023]
Abstract
OBJECTIVES Evening blue light has been shown to suppress melatonin, which can negatively impact sleep quality. The impact of evening blue light blocking (BLB) interventions on sleep remains ambiguous due to lack of randomized control trials. The present study tests the hypothesis that BLB glasses improve subjective and objective sleep in a population of healthy adults. DESIGN Two-week, randomized, controlled, crossover design. SETTING At-home testing of individuals in Michigan and Montana. PARTICIPANTS Twenty healthy adults (11 men, 9 women, age: 32 ± 12, body mass index: 28 ± 4 kg/m2). INTERVENTION Following a 1-week run-in baseline (ie, no glasses), participants were randomized to 1-week of BLB or control (ie, clear lens) glasses. Upon finishing the 1-week intervention, participants crossed over to the opposite condition. In both conditions, glasses were worn for 7 consecutive days from 6 PM until bedtime. MEASUREMENTS Objective sleep parameters were obtained using wrist actigraphy. Subjective sleep measures were assessed using sleep diaries. Karolinska Sleep Diaries were used to assess perceived sleep quality. RESULTS BLB reduced subjective sleep onset (21 ± 28 vs 24 ± 21 minute, P = .033) and awakenings (1.6 ± 1.0 vs 2.2 ± 1.0 awakenings, P = .019) compared to the control condition. In contrast, objective measures of sleep were not significantly impacted. In fact, our primary outcome variable of total sleep time (TST) tended to be paradoxically shorter in the BLB condition for both subjective (468 ± 45 vs 480 ± 48 minute, P = .066) and objective (433 ± 40 vs 449 ± 39 minute, P = .075) TST. CONCLUSIONS Blue light blocking glasses did not improve objective measures of sleep time or quality in healthy adults.
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Affiliation(s)
- Jeremy A Bigalke
- Department of Health and Human Development, Montana State University, Bozeman, Montana, USA; Department of Psychology, Montana State University, Bozeman, Montana, USA
| | - Ian M Greenlund
- Department of Health and Human Development, Montana State University, Bozeman, Montana, USA; Department of Psychology, Montana State University, Bozeman, Montana, USA
| | - Jennifer R Nicevski
- Department of Health and Human Development, Montana State University, Bozeman, Montana, USA
| | - Jason R Carter
- Department of Health and Human Development, Montana State University, Bozeman, Montana, USA; Department of Psychology, Montana State University, Bozeman, Montana, USA.
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31
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Feder MA, Baroni A. Just Let Me Sleep in: Identifying and Treating Delayed Sleep Phase Disorder in Adolescents. Child Adolesc Psychiatr Clin N Am 2021; 30:159-174. [PMID: 33223060 DOI: 10.1016/j.chc.2020.08.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Individuals with delayed sleep phase disorder (DSPD) are unable to naturally fall asleep and awake at conventional times; for this reason, DSPD is often mistaken for insomnia. However, unlike many patients with insomnia, those with DSPD struggle to get up at appropriate times. DSPD is associated with school refusal, academic difficulties, and lower employment rate. DSPD in youth has prevalence as high as 16%, and is often comorbid with other psychiatric disorders. Treatments include appropriate light exposure during the day, melatonin use, developing an evening routine that minimizes arousal-increasing activities, and gradually shifting sleep-wake times toward more functional ones.
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Affiliation(s)
- Michael A Feder
- Department of Child and Adolescent Psychiatry, Hassenfeld Children's Hospital at NYU Langone, NYC H+H/Bellevue, New York, NY, USA; Child Study Center, One Park Avenue, 7th Floor, New York, NY 10016, USA
| | - Argelinda Baroni
- Department of Child and Adolescent Psychiatry, Hassenfeld Children's Hospital at NYU Langone, NYC H+H/Bellevue, New York, NY, USA; Child Study Center, One Park Avenue, 7th Floor, New York, NY 10016, USA.
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32
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Hadi J, Wu S, Brightwell G. Antimicrobial Blue Light versus Pathogenic Bacteria: Mechanism, Application in the Food Industry, Hurdle Technologies and Potential Resistance. Foods 2020; 9:E1895. [PMID: 33353056 PMCID: PMC7767196 DOI: 10.3390/foods9121895] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/12/2020] [Accepted: 12/16/2020] [Indexed: 12/12/2022] Open
Abstract
Blue light primarily exhibits antimicrobial activity through the activation of endogenous photosensitizers, which leads to the formation of reactive oxygen species that attack components of bacterial cells. Current data show that blue light is innocuous on the skin, but may inflict photo-damage to the eyes. Laboratory measurements indicate that antimicrobial blue light has minimal effects on the sensorial and nutritional properties of foods, although future research using human panels is required to ascertain these findings. Food properties also affect the efficacy of antimicrobial blue light, with attenuation or enhancement of the bactericidal activity observed in the presence of absorptive materials (for example, proteins on meats) or photosensitizers (for example, riboflavin in milk), respectively. Blue light can also be coupled with other treatments, such as polyphenols, essential oils and organic acids. While complete resistance to blue light has not been reported, isolated evidence suggests that bacterial tolerance to blue light may occur over time, especially through gene mutations, although at a slower rate than antibiotic resistance. Future studies can aim at characterizing the amount and type of intracellular photosensitizers across bacterial species and at assessing the oxygen-independent mechanism of blue light-for example, the inactivation of spoilage bacteria in vacuum-packed meats.
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Affiliation(s)
- Joshua Hadi
- AgResearch Ltd., Hopkirk Research Institute, Cnr University and Library Road, Massey University, Palmerston North 4442, New Zealand; (J.H.); (S.W.)
| | - Shuyan Wu
- AgResearch Ltd., Hopkirk Research Institute, Cnr University and Library Road, Massey University, Palmerston North 4442, New Zealand; (J.H.); (S.W.)
| | - Gale Brightwell
- AgResearch Ltd., Hopkirk Research Institute, Cnr University and Library Road, Massey University, Palmerston North 4442, New Zealand; (J.H.); (S.W.)
- New Zealand Food Safety Science and Research Centre, Tennent Drive, Massey University, Palmerston North 4474, New Zealand
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33
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Esaki Y, Takeuchi I, Tsuboi S, Fujita K, Iwata N, Kitajima T. A double-blind, randomized, placebo-controlled trial of adjunctive blue-blocking glasses for the treatment of sleep and circadian rhythm in patients with bipolar disorder. Bipolar Disord 2020; 22:739-748. [PMID: 32276301 DOI: 10.1111/bdi.12912] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
OBJECTIVES Recent studies have suggested that evening blue light exposure is associated with sleep and circadian rhythm abnormalities. This study examined the effect of blue-blocking (BB) glasses on sleep and circadian rhythm in patients with bipolar disorder (BD). METHODS We used a randomized, placebo-controlled, double-blinded design. Outpatients with BD and also with insomnia were randomly assigned to wear either orange glasses (BB) or clear ones (placebo) and were instructed to use these from 20:00 hours until bedtime for 2 weeks. The primary outcome metric was the difference in change from baseline to after intervention in sleep quality, as measured by the visual analog scale (VAS). RESULTS Forty-three patients were included in this study (BB group, 21; placebo group, 22). The change in sleep quality as per the VAS metric was not significantly different between the two groups (95% confidence interval [CI], -3.34 to 24.72; P = .13). However, the Morningness-Eveningness Questionnaire score had shifted to an advanced rhythm in the BB group and to a delayed rhythm in the placebo group, and the difference in these changes was statistically significant (95% CI, 1.69-7.45; P = .003). The change in the actigraphy sleep parameters and mood symptoms was not significantly different between the two groups. CONCLUSION Although concurrent medications may have influenced, our results suggest that BB glasses may be useful as an adjunctive treatment for circadian rhythm issues in patients with BD.
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Affiliation(s)
- Yuichi Esaki
- Department of Psychiatry, Okehazama Hospital, Toyoake, Aichi, Japan.,Department of Psychiatry, Fujita Health University School of Medicine, Aichi, Japan
| | - Ipei Takeuchi
- Department of Psychiatry, Okehazama Hospital, Toyoake, Aichi, Japan
| | - Soji Tsuboi
- Department of Psychiatry, Okehazama Hospital, Toyoake, Aichi, Japan
| | - Kiyoshi Fujita
- Department of Psychiatry, Okehazama Hospital, Toyoake, Aichi, Japan.,The Neuroscience Research Center, Aichi, Japan
| | - Nakao Iwata
- Department of Psychiatry, Fujita Health University School of Medicine, Aichi, Japan
| | - Tsuyoshi Kitajima
- Department of Psychiatry, Fujita Health University School of Medicine, Aichi, Japan
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Abstract
In this highly digitalized era, sleep disorders are becoming more common and are associated with an increased burden of chronic disease. Shift workers are at an increased risk for both sleep disorders and metabolic syndrome. In this article, the authors outline the connection between circadian discordance, hormonal imbalance, and the development of metabolic syndrome in shift workers. Based on a literature review of animal model studies, observational studies, and clinical trials conducted between August and October of 2018, the authors offer several clinical interventions, including work schedules, light therapy, medications, and dietary habits to improve the circadian synchronicity of shift workers and reduce their risk of morbidity and mortality. It is important for physicians to be familiar with the consequences of shift work and ways to mitigate the risks for this patient population.
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Shechter A, Quispe KA, Mizhquiri Barbecho JS, Slater C, Falzon L. Interventions to reduce short-wavelength ("blue") light exposure at night and their effects on sleep: A systematic review and meta-analysis. SLEEP ADVANCES : A JOURNAL OF THE SLEEP RESEARCH SOCIETY 2020; 1:zpaa002. [PMID: 37192881 PMCID: PMC10127364 DOI: 10.1093/sleepadvances/zpaa002] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 04/15/2020] [Indexed: 12/20/2022]
Abstract
The sleep-wake and circadian cycles are influenced by light, particularly in the short-wavelength portion of the visible spectrum. Most personal light-emitting electronic devices are enriched in this so-called "blue" light. Exposure to these devices in the evening can disturb sleep. Interventions to reduce short-wavelength light exposure before bedtime may reduce adverse effects on sleep. We conducted a systematic review and meta-analysis to examine the effect of wearing color-tinted lenses (e.g. orange or amber) in frames to filter short-wavelength light exposure to the eye before nocturnal sleep. Outcomes were self-reported or objective measures of nocturnal sleep. Relatively few (k = 12) studies have been done. Study findings were inconsistent, with some showing benefit and others showing no effect of intervention. Meta-analyses yielded a small-to-medium magnitude combined effect size for sleep efficiency (Hedge's g = 0.31; 95% CI: -0.05, 0.66; I2 = 38.16%; k = 7), and a small-to-medium combined effect size for total sleep time (Hedge's g = 0.32; 95% CI: 0.01, 0.63; I2 = 12.07%; k = 6). For self-report measures, meta-analysis yielded a large magnitude combined effects size for Pittsburgh Sleep Quality Index ratings (Hedge's g = -1.25; 95% CI: -2.39, -0.11; I2 = 36.35%; k = 3) and a medium combined effect size for total sleep time (Hedge's g = 0.51; 95% CI: 0.18, 0.84; I2 = 0%; k = 3), Overall, there is some, albeit mixed, evidence that this approach can improve sleep, particularly in individuals with insomnia, bipolar disorder, delayed sleep phase syndrome, or attention-deficit hyperactive disorder. Considering the ubiquitousness of short-wavelength-enriched light sources, future controlled studies to examine the efficacy of this approach to improve sleep are warranted. Systematic review registration: PROSPERO 2018 CRD42018105854.
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Affiliation(s)
- Ari Shechter
- Center for Behavioral Cardiovascular Health, Columbia University Irving Medical Center, New York, NY
- Sleep Center of Excellence, Columbia University Irving Medical Center, New York, NY
| | - Kristal A Quispe
- Center for Behavioral Cardiovascular Health, Columbia University Irving Medical Center, New York, NY
| | | | - Cody Slater
- Columbia University Vagelos College of Physicians and Surgeons, New York, NY
| | - Louise Falzon
- Center for Personalized Health, Feinstein Institutes for Medical Research, Northwell Health, New York, NY
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Duda M, Domagalik A, Orlowska-Feuer P, Krzysztynska-Kuleta O, Beldzik E, Smyk MK, Stachurska A, Oginska H, Jeczmien-Lazur JS, Fafrowicz M, Marek T, Lewandowski MH, Sarna T. Melanopsin: From a small molecule to brain functions. Neurosci Biobehav Rev 2020; 113:190-203. [DOI: 10.1016/j.neubiorev.2020.03.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 03/05/2020] [Accepted: 03/09/2020] [Indexed: 12/29/2022]
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Šmotek M, Fárková E, Manková D, Kopřivová J. Evening and night exposure to screens of media devices and its association with subjectively perceived sleep: Should "light hygiene" be given more attention? Sleep Health 2020; 6:498-505. [PMID: 32197951 DOI: 10.1016/j.sleh.2019.11.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 11/18/2019] [Accepted: 11/22/2019] [Indexed: 12/19/2022]
Abstract
OBJECTIVE The aim of the study was to examine subjective sleep quality in a population of healthy volunteers and its association with evening and night light exposure to screens of media devices. METHODS A total of 693 participants (mean age 31.2±11.4 years, 159 men, and 538 women) completed an online questionnaire battery consisting of several sleep-related questionnaires: PSQI, FSS, MCTQ, MEQ, and added questions assessing the timing and character the evening and night exposure to electronical devices (TV, PC, tablets, and phones), and the use of various filters blocking short-wavelength light. RESULTS Statistical analyses show that longer cumulative exposure to screen light in the evening was associated with greater sleep inertia in the morning (P = .019, η2=0.141) and longer sleep latency on workdays P = .038, η2=0.135). Furthermore, exposure to screen light 1.5 h before sleep or during night awakenings was also associated with a decreased chance to wake up before alarm clock (P = .003, d=0.30), larger social jet lag (P < .001, d=0.15), more daytime dysfunction (P < .001, d=0.40), decreased subjective sleep quality (P = .024, d=0.16), and more fatigue (P < .001, d=0.52). A statistical trend for an increase in duration of sleep on weekdays (P = .058, d=0.23) was also found in participants using blue-light filters in the evening hours. DISCUSSION Our results are in line with other studies that converge to show the negative association of evening and night exposure to short-wavelength light on subjective and objective sleep parameters. Results suggest that light hygiene in general population should be given more attention not only in the context of clinical sleep medicine but also in the realm of public health.
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Affiliation(s)
- Michal Šmotek
- National Institute of Mental Health, Klecany, Czech Republic; Third Faculty of Medicine, Charles University, Prague, Czech Republic.
| | - Eva Fárková
- National Institute of Mental Health, Klecany, Czech Republic; Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Denisa Manková
- National Institute of Mental Health, Klecany, Czech Republic
| | - Jana Kopřivová
- National Institute of Mental Health, Klecany, Czech Republic; Third Faculty of Medicine, Charles University, Prague, Czech Republic
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Knufinke M, Nieuwenhuys A, Geurts SA, Møst EI, Moen MH, Maase K, Coenen AM, Gordijn MC, Kompier MA. Dim light, sleep tight, and wake up bright – Sleep optimization in athletes by means of light regulation. Eur J Sport Sci 2020; 21:7-15. [DOI: 10.1080/17461391.2020.1722255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Melanie Knufinke
- Behavioural Science Institute, Radboud University, Nijmegen, The Netherlands
- Department of Exercise Sciences, The University of Auckland, Auckland, New Zealand
| | - Arne Nieuwenhuys
- Behavioural Science Institute, Radboud University, Nijmegen, The Netherlands
- Philips Strategy and Innovation, Research, Eindhoven, The Netherlands
| | - Sabine A.E. Geurts
- Behavioural Science Institute, Radboud University, Nijmegen, The Netherlands
| | - Els I.S. Møst
- Department of Elite Sports, Netherlands Olympic Committee * Netherlands Sports Federation, Arnhem, The Netherlands
| | - Maarten H. Moen
- Donders Center for Cognition, Radboud University, Nijmegen, The Netherlands
| | - Kamiel Maase
- Donders Center for Cognition, Radboud University, Nijmegen, The Netherlands
| | - Anton M.L. Coenen
- Chronobiology Unit, Groningen Institute of Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | - Marijke C.M. Gordijn
- Philips Experience Design, Eindhoven, The Netherlands
- Chrono@Work B.V., Groningen, The Netherlands
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Rosenfield M, Li RT, Kirsch NT. A double-blind test of blue-blocking filters on symptoms of digital eye strain. Work 2020; 65:343-348. [DOI: 10.3233/wor-203086] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Affiliation(s)
| | - Rui Ting Li
- SUNY College of Optometry, New York, NY, USA
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Côté-Lussier C, Knudby A, Barnett TA. A novel low-cost method for assessing intra-urban variation in night time light and applications to public health. Soc Sci Med 2020; 248:112820. [PMID: 32036268 DOI: 10.1016/j.socscimed.2020.112820] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 12/16/2019] [Accepted: 01/27/2020] [Indexed: 12/12/2022]
Abstract
Night time lighting (NTL) pollution is a public health concern given its known impact on a range of health outcomes. The daily cycle of the hue of natural ambient light shifting from relatively blue-white light at noon to relatively yellow-red light at sunset is important for human functioning. Disruptions of the circadian clock can result in melatonin suppression, sleep and mood disorders, and increased risks of cancer in adults. Current measures of intra-urban variation in NTL are based on costly in-person or coarse satellite image-based assessments. The central objective of the current study is to validate a novel low-cost measure of intra-urban NTL variation. Estimates of red, green and blue NTL intensity were derived from a cloud-free night time image of the city of Montreal, Canada, taken from the International Space Station (ISS). The new measures are shown to converge with in-person assessed NTL and to predict known child health-related outcomes. Specifically, the results suggest that ISS-assessed blue NTL is associated with feelings of safety and self-reported health. In conclusion, ISS-based measures of NTL, particularly of blue NTL, are valid indicators of intra-urban variation in NTL for applications in public health. Limitations of, and future directions for, the method are discussed.
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Affiliation(s)
- Carolyn Côté-Lussier
- Centre Urbanisation Culture Société, Institut National de la Recherche Scientifique, 385 Sherbrooke East, Montreal, Quebec, H2X 1E3, Canada; Department of Criminology, University of Ottawa, 120 University, Ottawa, Ontario, K1N 6N5, Canada.
| | - Anders Knudby
- Department of Geography, Environment and Geomatics, University of Ottawa, 120 University, Ottawa, Ontario, K1N 6N5, Canada
| | - Tracie A Barnett
- Department of Family Medicine, McGill University, 5858, Chemin de la Côte-des-Neiges, Suite 300, Montréal, QC, H3S 1Z1, Canada; Unité d'épidémiologie et de biostatistique, Centre INRS-Institut Armand-Frappier Santé Biotechnologie, 531 Boul. des Prairies, Laval, Quebec, H7V 1B7, Canada; Centre de recherche du CHU Sainte-Justine, 5757 Avenue Decelles, Montréal, Québec, H3S 2C3, Canada
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Spectral Evaluation of Eyeglass Blocking Efficiency of Ultraviolet/High-energy Visible Blue Light for Ocular Protection. Optom Vis Sci 2020; 96:513-522. [PMID: 31274740 PMCID: PMC6615932 DOI: 10.1097/opx.0000000000001393] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Supplemental digital content is available in the text. SIGNIFICANCE We investigated, for safety and awareness, ultraviolet and high-energy violet light–blocking protection provided by assorted types of eyewear. Ultraviolet and high-energy violet light–filtering efficiency varied and did not correlate with price or advertised claims. Standardization of methods and specifications for lens spectral transmission evaluation is recommended. PURPOSE Studies have linked exposure of high-energy visible blue light to effect and damage on retinal epithelial cells, photoreceptors, and ganglion cells. “Blue light” is more accurately differentiated into “high-energy visible blue-violet light” and “circadian rhythm blue-turquoise light.” This study measured and compared spectral transmission of ultraviolet and high-energy violet light of low-, medium-, and high-priced sunglasses. METHODS Sunglasses and lens blanks were obtained from the University of Texas Medical Branch Optical Shop and vendors. Groups were based on promotional, retail, designer sunglasses, or “blue blocker” lenses. The percent transmittance of ultraviolet/visible spectral scans (800 to 350 nm) was measured using an Agilent Cary 50 spectrophotometer. High-energy violet/blue light was defined as 400 to 450 nm. RESULTS Promotional sunglasses (tinted polycarbonate) blocked 100% ultraviolet and 67 to 99.8% high-energy violet blue light. Retail sunglasses filtered out 95 to 100% ultraviolet A and 67% high-energy violet light. The tested designer sunglasses varied widely in their optical transmissibility with respect to their ultraviolet A and high-energy violet light–blocking properties, with some not blocking ultraviolet A. Clear and colorless Kodak Total Blue provided maximal high-energy violet protection, whereas clear Essilor Crizal Prevencia provided less high-energy violet blocking between 400 and 450 nm. CONCLUSIONS The ultraviolet and high-energy violet (400 to 450 nm) light–filtering efficiency varied between sunglasses and clear lenses and did not correlate with price or advertised claims. Standardization of methods and specifications for lens spectral transmission evaluation is recommended.
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Spitschan M, Lazar R, Cajochen C. Visual and non-visual properties of filters manipulating short-wavelength light. Ophthalmic Physiol Opt 2020; 39:459-468. [PMID: 31696535 PMCID: PMC6887545 DOI: 10.1111/opo.12648] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 09/26/2019] [Indexed: 12/14/2022]
Abstract
Purpose Optical filters and tints manipulating short‐wavelength light (sometimes called ‘blue‐blocking’ or ‘blue‐attenuating’ filters) are used in the management of a range of ocular, retinal, neurological and psychiatric disorders. In many cases, the only available quantification of the optical effects of a given optical filter is the spectral transmittance, which specifies the amount of light transmitted as a function of wavelength. Methods We propose a novel physiologically relevant and retinally referenced framework for quantifying the visual and non‐visual effects of these filters, incorporating the attenuation of luminance (luminous transmittance), the attenuation of melanopsin activation (melanopsin transmittance), the colour shift, and the reduction of the colour gamut (gamut reduction). Using these criteria, we examined a novel database of spectral transmittance functions of optical filters (n = 121) which were digitally extracted from a variety of sources. Results We find a large diversity in the alteration of visual and non‐visual properties. The spectral transmittance properties of the examined filters vary widely, in terms of shapes and cut‐off wavelengths. All filters show relatively more melanopsin attenuation than luminance attenuation (lower melanopsin transmittance than luminous transmittance). Across the data set, we find that melanopsin transmittance and luminous transmittance are correlated. Conclusions We suggest that future studies and examinations of the physiological effects of optical filters quantify the visual and non‐visual effects of the filters beyond the spectral transmittance, which will eventually aid in developing a mechanistic understanding of how different filters affect physiology. We strongly discourage comparing the downstream effects of different filters on, e.g. sleep or circadian responses, without considering their effects on the retinal stimulus.
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Affiliation(s)
- Manuel Spitschan
- Department of Experimental Psychology, University of Oxford, Oxford, UK.,Centre for Chronobiology, Psychiatric Hospital of the University of Basel (UPK), Basel, Switzerland.,Transfaculty Research Platform Molecular and Cognitive Neurosciences, University of Basel, Basel, Switzerland
| | - Rafael Lazar
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel (UPK), Basel, Switzerland.,Transfaculty Research Platform Molecular and Cognitive Neurosciences, University of Basel, Basel, Switzerland
| | - Christian Cajochen
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel (UPK), Basel, Switzerland.,Transfaculty Research Platform Molecular and Cognitive Neurosciences, University of Basel, Basel, Switzerland
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43
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Wahl S, Engelhardt M, Schaupp P, Lappe C, Ivanov IV. The inner clock-Blue light sets the human rhythm. JOURNAL OF BIOPHOTONICS 2019; 12:e201900102. [PMID: 31433569 PMCID: PMC7065627 DOI: 10.1002/jbio.201900102] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/02/2019] [Accepted: 08/18/2019] [Indexed: 05/06/2023]
Abstract
Visible light synchronizes the human biological clock in the suprachiasmatic nuclei of the hypothalamus to the solar 24-hour cycle. Short wavelengths, perceived as blue color, are the strongest synchronizing agent for the circadian system that keeps most biological and psychological rhythms internally synchronized. Circadian rhythm is important for optimum function of organisms and circadian sleep-wake disruptions or chronic misalignment often may lead to psychiatric and neurodegenerative illness. The beneficial effect on circadian synchronization, sleep quality, mood, and cognitive performance depends not only on the light spectral composition but also on the timing of exposure and its intensity. Exposure to blue light during the day is important to suppress melatonin secretion, the hormone that is produced by the pineal gland and plays crucial role in circadian rhythm entrainment. While the exposure to blue is important for keeping organism's wellbeing, alertness, and cognitive performance during the day, chronic exposure to low-intensity blue light directly before bedtime, may have serious implications on sleep quality, circadian phase and cycle durations. This rises inevitably the need for solutions to improve wellbeing, alertness, and cognitive performance in today's modern society where exposure to blue light emitting devices is ever increasing.
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Affiliation(s)
- Siegfried Wahl
- Institute for Ophthalmic ResearchUniversity of TuebingenTuebingenGermany
- Carl Zeiss Vision International GmbHAalenGermany
| | - Moritz Engelhardt
- Institute for Ophthalmic ResearchUniversity of TuebingenTuebingenGermany
| | | | | | - Iliya V. Ivanov
- Institute for Ophthalmic ResearchUniversity of TuebingenTuebingenGermany
- Carl Zeiss Vision International GmbHAalenGermany
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Gottlieb JF, Benedetti F, Geoffroy PA, Henriksen TEG, Lam RW, Murray G, Phelps J, Sit D, Swartz HA, Crowe M, Etain B, Frank E, Goel N, Haarman BCM, Inder M, Kallestad H, Jae Kim S, Martiny K, Meesters Y, Porter R, Riemersma-van der Lek RF, Ritter PS, Schulte PFJ, Scott J, Wu JC, Yu X, Chen S. The chronotherapeutic treatment of bipolar disorders: A systematic review and practice recommendations from the ISBD task force on chronotherapy and chronobiology. Bipolar Disord 2019; 21:741-773. [PMID: 31609530 DOI: 10.1111/bdi.12847] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
AIMS To systematically review the literature on the efficacy and tolerability of the major chronotherapeutic treatments of bipolar disorders (BD)-bright light therapy (LT), dark therapy (DT), treatments utilizing sleep deprivation (SD), melatonergic agonists (MA), interpersonal social rhythm therapy (IPSRT), and cognitive behavioral therapy adapted for BD (CBTI-BP)-and propose treatment recommendations based on a synthesis of the evidence. METHODS PRISMA-based systematic review of the literature. RESULTS The acute antidepressant (AD) efficacy of LT was supported by several open-label studies, three randomized controlled trials (RCTs), and one pseudorandomized controlled trial. SD showed rapid, acute AD response rates of 43.9%, 59.3%, and 59.4% in eight case series, 11 uncontrolled, studies, and one RCT, respectively. Adjunctive DT obtained significant, rapid anti-manic results in one RCT and one controlled study. The seven studies on MA yielded very limited data on acute antidepressant activity, conflicting evidence of both antimanic and maintenance efficacy, and support from two case series of improved sleep in both acute and euthymic states. IPSRT monotherapy for bipolar II depression had acute response rates of 41%, 67%, and 67.4% in two open studies and one RCT, respectively; as adjunctive therapy for bipolar depression in one RCT, and efficacy in reducing relapse in two RCTs. Among euthymic BD subjects with insomnia, a single RCT found CBTI-BP effective in delaying manic relapse and improving sleep. Chronotherapies were generally safe and well-tolerated. CONCLUSIONS The outcome literature on the adjunctive use of chronotherapeutic treatments for BP is variable, with evidence bases that differ in size, study quality, level of evidence, and non-standardized treatment protocols. Evidence-informed practice recommendations are offered.
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Affiliation(s)
- John F Gottlieb
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Chicago Psychiatry Associates, Chicago, IL, USA
| | | | - Pierre A Geoffroy
- Department of Psychiatry and Addictive Medicine, University Hospital Bichat-Claude Bernard, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France.,Paris Diderot University - Paris VII, Paris, France
| | - Tone E G Henriksen
- Faculty of Medicine, Section for Psychiatry, Department of Clinical Medicine, University of Bergen, Bergen, Norway.,Faculty of Psychology, Bergen Stress and Sleep Group, University of Bergen, Bergen, Norway.,Valen Hospital, Fonna Health Authority, Division of Mental Health Care, Valen, Norway
| | - Raymond W Lam
- Department of Psychiatry, The University of British Columbia, Vancouver, BC, Canada
| | - Greg Murray
- Swinburne University of Technology, Hawthorn, VIC, Australia
| | | | - Dorothy Sit
- Asher Center for the Study and Treatment of Depressive Disorders, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Holly A Swartz
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, USA
| | - Marie Crowe
- Department of Psychological Medicine, University of Otago Christchurch, Christchurch, New Zealand
| | - Bruno Etain
- Department of Psychological Medicine, Universite Paris Diderot UFR de Medecine, Paris, France
| | - Ellen Frank
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, USA.,Department of Psychology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Namni Goel
- Department of Psychiatry Philadelphia, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Bartholomeus C M Haarman
- Department of Psychiatry Groningen, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Maree Inder
- Department of Psychological Medicine, University of Otago Christchurch, Christchurch, New Zealand
| | - Håvard Kallestad
- Faculty of Medicine and Health Sciences, Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway.,Division of Psychiatry, Department of Research and Development, St. Olavs University Hospital, Trondheim, Norway
| | - Seong Jae Kim
- Department of Psychiatry, Doeun Hospital, Jincheon, Korea
| | - Klaus Martiny
- Department of Clinical Medicine, University of Copenhagen, Kobenhavns, Denmark
| | - Ybe Meesters
- Department of Psychiatry Groningen, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Richard Porter
- Department of Psychological Medicine, University of Otago Christchurch, Christchurch, New Zealand.,Canterbury District Health Board, Christchurch, New Zealand
| | - Rixt F Riemersma-van der Lek
- Department of Psychiatry Groningen, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Philipp S Ritter
- Klinik und Poliklinik für Psychiatrie und Psychotherapie, Universitatsklinikum Carl Gustav Carus, Dresden, Germany
| | | | - Jan Scott
- Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
| | - Joseph C Wu
- Department of Psychiatry & Human Behavior, University of California Irvine School of Medicine, Irvine, CA, USA
| | - Xin Yu
- Department of Public Mental Health, Peking University Institute of Mental Health, Beijing, China
| | - Shenghao Chen
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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45
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Carlson AS. A comparison of blue-light transmissions through blue-control lenses. AFRICAN VISION AND EYE HEALTH 2019. [DOI: 10.4102/aveh.v78i1.497] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Gladanac B, Jonkman J, Shapiro CM, Brown TJ, Ralph MR, Casper RF, Rahman SA. Removing Short Wavelengths From Polychromatic White Light Attenuates Circadian Phase Resetting in Rats. Front Neurosci 2019; 13:954. [PMID: 31551702 PMCID: PMC6746919 DOI: 10.3389/fnins.2019.00954] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 08/23/2019] [Indexed: 11/13/2022] Open
Abstract
Visible light is the principal stimulus for resetting the mammalian central circadian pacemaker. Circadian phase resetting is most sensitive to short-wavelength (blue) visible light. We examined the effects of removing short-wavelengths < 500 nm from polychromatic white light using optical filters on circadian phase resetting in rats. Under high irradiance conditions, both long- (7 h) and short- (1 h) duration short-wavelength filtered (< 500 nm) light exposure attenuated phase-delay shifts in locomotor activity rhythms by (∼40-50%) as compared to unfiltered light exposure. However, there was no attenuation in phase resetting under low irradiance conditions. Additionally, the reduction in phase-delay shifts corresponded to regionally specific attenuation in molecular markers of pacemaker activation in response to light exposure, including c-FOS, Per1 and Per2. These results demonstrate that removing short-wavelengths from polychromatic white light can attenuate circadian phase resetting in an irradiance dependent manner. These results have important implications for designing and optimizing lighting interventions to enhance circadian adaptation.
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Affiliation(s)
- Bojana Gladanac
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - James Jonkman
- Advanced Optical Microscopy Facility, University Health Network, Toronto, ON, Canada
| | - Colin M Shapiro
- Department of Psychiatry and Ophthalmology, University of Toronto, Toronto, ON, Canada.,Youthdale Child and Adolescent Sleep Centre, Toronto, ON, Canada
| | - Theodore J Brown
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada.,Division of Reproductive Endocrinology and Infertility, University of Toronto, Toronto, ON, Canada
| | - Martin R Ralph
- Department of Psychology, University of Toronto, Toronto, ON, Canada
| | - Robert F Casper
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada.,Division of Reproductive Endocrinology and Infertility, University of Toronto, Toronto, ON, Canada
| | - Shadab A Rahman
- Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, MA, United States.,Division of Sleep Medicine, Harvard Medical School, Boston, MA, United States
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47
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Scott J, Langsrud K, Vethe D, Kjørstad K, Vestergaard CL, Faaland P, Lydersen S, Vaaler A, Morken G, Torgersen T, Kallestad H. A pragmatic effectiveness randomized controlled trial of the duration of psychiatric hospitalization in a trans-diagnostic sample of patients with acute mental illness admitted to a ward with either blue-depleted evening lighting or normal lighting conditions. Trials 2019; 20:472. [PMID: 31370871 PMCID: PMC6676579 DOI: 10.1186/s13063-019-3582-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 07/16/2019] [Indexed: 12/13/2022] Open
Abstract
Background There is increasing recognition of the need to stabilize sleep-wake cycles in individuals with major mental disorders. As such, clinicians and researchers advocate the use of interventions targeted at sleep and circadian dysrhythmias as an adjunct to the standard treatments offered for acute illness episodes of a broad range of diagnoses. To determine the trans-diagnostic generalizability of chronotherapy, we explore the benefits of admitting individuals with an acute illness episode to a psychiatric inpatient unit where changes in light exposure are integrated into the therapeutic environment. Methods/design A two-arm, pragmatic effectiveness, randomized controlled treatment trial, where individuals admitted for acute inpatient psychiatric care will be allocated to a ward with blue-depleted evening light or to a ward with the same layout and facilities but lacking the new lighting technology. The trial will test whether the experimental lighting conditions offer any additional benefits beyond those associated with usual treatment in an acute psychiatric inpatient unit. The main objectives are to examine any differences between groups in the mean duration of hospitalization in days. Additional analyses will compare group differences in symptoms, functioning, medication usage, and side effects and whether length of stay is associated with stability of sleep-wake cycles and circadian rhythms. Ancillary investigations should determine any benefits according to diagnostic subgroups and potential drawbacks such as any adverse effects on the well-being of professionals working across both wards. Discussion This unit offers a unique opportunity to explore how exposure to different lighting conditions may modify sleep-wake cycles and how any changes in sleep-wake cycle may impact on the clinical and functional outcomes of individuals experiencing an acute episode of a severe mental disorder that requires inpatient care. The findings could influence the future design of hospital units offering care to patients with mental or physical disorders. Trial registration ClinicalTrials.gov, ID: NCT03788993. Retrospectively registered on 28 December 2018. Electronic supplementary material The online version of this article (10.1186/s13063-019-3582-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jan Scott
- Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway.,Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
| | - Knut Langsrud
- Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway.,Division of Mental Health Care, St. Olavs University Hospital, Trondheim, Norway
| | - Daniel Vethe
- Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway.,Division of Mental Health Care, St. Olavs University Hospital, Trondheim, Norway
| | - Kaia Kjørstad
- Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway.,Division of Mental Health Care, St. Olavs University Hospital, Trondheim, Norway
| | - Cecilie L Vestergaard
- Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway.,Division of Mental Health Care, St. Olavs University Hospital, Trondheim, Norway
| | - Patrick Faaland
- Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway.,Division of Mental Health Care, St. Olavs University Hospital, Trondheim, Norway
| | - Stian Lydersen
- Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway
| | - Arne Vaaler
- Division of Mental Health Care, St. Olavs University Hospital, Trondheim, Norway
| | - Gunnar Morken
- Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway.,Division of Mental Health Care, St. Olavs University Hospital, Trondheim, Norway
| | - Terje Torgersen
- Division of Mental Health Care, St. Olavs University Hospital, Trondheim, Norway
| | - Håvard Kallestad
- Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway. .,Division of Mental Health Care, St. Olavs University Hospital, Trondheim, Norway. .,Department of Research and Development, St. Olavs University Hospital, PO Box 3250, Sluppen, 7006, Trondheim, Norway.
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Abstract
This article reviews delayed and advanced sleep-wake phase disorders. Diagnostic procedures include a clinical interview to verify the misalignment of the major nocturnal sleep episode relative to the desired and social-normed timing of sleep, a 3-month or greater duration of the sleep-wake disturbance, and at least a week of sleep diary data consistent with the sleep timing complaint. Treatment options include gradual, daily shifting of the sleep schedule (chronotherapy); shifting circadian phase with properly timed light exposure (phototherapy); or melatonin administration. Future directions are discussed to conclude the article.
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Affiliation(s)
- Elizabeth Culnan
- Department of Psychiatry and Behavioral Sciences, Rush University Medical Center, 1653 West Congress Parkway, Chicago, IL 60612-3833, USA
| | - Lindsay M McCullough
- Department of Medicine, Rush University Medical Center, 1653 West Congress Parkway, Chicago, IL 60612-3833, USA
| | - James K Wyatt
- Department of Psychiatry and Behavioral Sciences, Rush University Medical Center, 1653 West Congress Parkway, Chicago, IL 60612-3833, USA. https://twitter.com/Chisleeper
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49
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Caldwell JA, Caldwell JL, Thompson LA, Lieberman HR. Fatigue and its management in the workplace. Neurosci Biobehav Rev 2019; 96:272-289. [DOI: 10.1016/j.neubiorev.2018.10.024] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 10/04/2018] [Accepted: 10/31/2018] [Indexed: 01/01/2023]
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50
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Basic and applied science interactions in fatigue understanding and risk mitigation. PROGRESS IN BRAIN RESEARCH 2019; 246:177-204. [DOI: 10.1016/bs.pbr.2019.03.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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