Three groups of two subjects each were kept in underground chambers, first for 4 days in an artificial light-dark cycle, and thereafter for 4 days in complete darkness. They lived on a rigorous time schedule. Physiological as well as psychological functions were measured at 3-hour intervals. There were no differences in the results between the two sections of the experiment. Social cues are sufficient to entrain human circadian rhythms, and absence of light has no immediate effect on the functions measured.
Twenty-four-hour rhythms of rectal temperature in humans: effects of sleep-interruptions and of test-sessions
Altered sleep duration and sleep period time displacements: effects on performance in habitual long sleepers
Activity and reproductive state in the hamster: independent control by social stimuli and a circadian pacemaker
Effects of histamine and alpha-fluoromethylhistidine injections on circadian phase of free-running rhythms
Sex differences and effects of social cues on daily rhythms following phase advances in Octodon degus
Visual circadian rhythmicity in splitbrain crayfish: a plastic behavioral expression of symmetric circadian pacemakers
Human sleep-wake cycles in the high Arctic: effects of unusual photoperiodicity in a natural setting
Circadian phase-shifting effects of a laboratory environment: a clinical trial with bright and dim light
Sensitivity of the human circadian pacemaker to nocturnal light: melatonin phase resetting and suppression
Calculating the Social Rhythm Metric (SRM) and Examining Its Use in Interpersonal Social Rhythm Therapy (IPSRT) in a Healthy Population Study
Interindividual differences in a set of biological rhythms documented during the high arctic summer (79 degrees N) in three healthy subjects
Cognitive Behavioral Social Rhythm Group Therapy for Veterans with posttraumatic stress disorder, depression, and sleep disturbance: Results from an open trial
Watching the clock and hitting the snooze button: introduction to the special issue on circadian rhythms and sleep in neurological disorders
Synchronization as a biological, psychological and social mechanism to create common time: A theoretical frame and a single case study
Randomized controlled trial of melatonin for children with autistic spectrum disorders and sleep problems
Serotonergic antagonists impair arousal-induced phase shifts of the circadian system of the syrian hamster
Chrono-immunology: progress and challenges in understanding links between the circadian and immune systems
Non-photic phase shifting of the circadian activity rhythm of Syrian hamsters: the relative potency of arousal and melatonin
Circularly polarised MF (500 micro T 50 Hz) does not acutely suppress melatonin secretion from cultured Wistar rat pineal glands
Altered circadian patterns of salivary cortisol in low-functioning children and adolescents with autism
Systematic evaluation of Axis-I DSM diagnoses in delayed sleep phase disorder and evening-type circadian preference
Genetics of the mammalian circadian system: Photic entrainment, circadian pacemaker mechanisms, and posttranslational regulation
Can exercise regulate the circadian system of adolescents? Novel implications for the treatment of delayed sleep-wake phase disorder
Sleep/awake status throughout the night and circadian motor activity patterns in older nursing-home residents with or without dementia, and older community-dwelling people without dementia
Ramadan and bipolar disorder: Example of circadian rhythm disturbance and its impact on patients with bipolar disorders
Phase-dependent effect of room light exposure in a 5-h advance of the sleep-wake cycle: implications for jet lag
Melatonin rhythm observed throughout a three-cycle bright-light stimulus designed to reset the human circadian pacemaker
Light treatment for sleep disorders: consensus report. II. Basic properties of circadian physiology and sleep regulation
Olfactory cues accelerate reentrainment following phase shifts and entrain free-running rhythms in female Octodon degus (Rodentia)
Odor-specific effects on reentrainment following phase advances in the diurnal rodent, Octodon degus
Differential regulation of circadian melatonin rhythm and sleep-wake cycle by bright lights and nonphotic time cues in humans
The chronotherapeutic treatment of bipolar disorders: A systematic review and practice recommendations from the ISBD task force on chronotherapy and chronobiology
Self-reported discomfort associated with Daylight Saving Time in Brazilian tropical and subtropical zones
Circadian periodicity of the excretion of electrolytes, catecholamine metabolites and 17-hydroxycorticosteroids in urine
Roles of intensity and duration of nocturnal exercise in causing phase delays of human circadian rhythms
Examining the Behavioural Sleep-Wake Rhythm in Adults with Autism Spectrum Disorder and No Comorbid Intellectual Disability
Physical exercise accelerates reentrainment of human sleep-wake cycle but not of plasma melatonin rhythm to 8-h phase-advanced sleep schedule
An arousing, musically enhanced bird song stimulus mediates circadian rhythm phase advances in dim light
Morning and evening physical exercise differentially regulate the autonomic nervous system during nocturnal sleep in humans
Human circadian melatonin rhythm phase delay during a fixed sleep-wake schedule interspersed with nights of sleep deprivation
MondoA:MLX complex regulates glucose-dependent gene expression and links to circadian rhythm in liver and brain of the freeze-tolerant wood frog, Rana sylvatica
Pilot Observational Study to Detect Diurnal Variation and Misalignment in Heart Rate Among Critically Ill Patients
Selection for Timing of Eclosion Results in Co-evolution of Temperature Responsiveness in Drosophila melanogaster
Review: Identification and Management of Circadian Rhythm Sleep Disorders as a Transdiagnostic Feature in Child and Adolescent Psychiatry.
Entrainment in harmonically forced continuous and impulsive Goodwin’s oscillators: a comparison study
Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.
Neural Activity: Imaging
Imaging of neural activity in vivo has developed rapidly recently with the advancement of fluorescence microscopy, including new applications using miniaturized microscopes (miniscopes). This feed follows the progress in this growing field.
The Tendon Seed Network
Tendons are rich in the extracellular matrix and are abundant throughout the body providing essential roles including structure and mobility. The transcriptome of tendons is being compiled to understand the micro-anatomical functioning of tendons. Discover the latest research pertaining to the Tendon Seed Network here.
Myocardial stunning is a mechanical dysfunction that persists after reperfusion of previously ischemic tissue in the absence of irreversible damage including myocardial necrosis. Here is the latest research.
Chronic Fatigue Syndrome
Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.
Incretins are metabolic hormones that stimulate a decrease in glucose levels in the blood and they have been implicated in glycemic regulation in the remission phase of type 1 diabetes. Here is the latest research.
Chromatin Regulation and Circadian Clocks
The circadian clock plays an important role in regulating transcriptional dynamics through changes in chromatin folding and remodelling. Discover the latest research on Chromatin Regulation and Circadian Clocks here.
“Long Covid-19” describes illness in patients who are reporting long-lasting effects of the SARS-CoV-19 infection, often long after they have recovered from acute Covid-19. Ongoing health issues often reported include low exercise tolerance and breathing difficulties, chronic tiredness, and mental health problems such as post-traumatic stress disorder and depression. This feed follows the latest research into Long Covid.
Spatio-Temporal Regulation of DNA Repair
DNA repair is a complex process regulated by several different classes of enzymes, including ligases, endonucleases, and polymerases. This feed focuses on the spatial and temporal regulation that accompanies DNA damage signaling and repair enzymes and processes.