Results 41 to 50 of about 23,161 (222)

Chronobiology of Epilepsy [PDF]

, 2008
A fine balance between neuronal excitation and inhibition governs the physiological state of the brain. It has been hypothesized that when this balance is lost as a result of excessive excitation or reduced inhibition, pathological states such as ...
Dong-Uk Hwang, Hector Sepulveda, Mark Spano, Paul Carney, Sachin S. Talathi, Tom Mareci, William Ditto   +6 more
core   +1 more source

The Ecology of Human Sleep (EcoSleep) Cohort Study: Protocol for a longitudinal repeated measurement burst design study to assess the relationship between sleep determinants and outcomes under real‐world conditions across time of year

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary The interplay of daily life factors, including mood, physical activity, or light exposure, influences sleep architecture and quality. Laboratory‐based studies often isolate these determinants to establish causality, thereby sacrificing ecological validity.
Anna M. Biller, Nayab Fatima, Chrysanth Hamberger, Laura Hainke, Verena Plankl, Amna Nadeem, Achim Kramer, Martin Hecht, Manuel Spitschan   +8 more
wiley   +1 more source

Rhythms of Locomotion Expressed by Limulus polyphemus, the American Horseshoe Crab: II. Relationship to Circadian Rhythms of Visual Sensitivity [PDF]

, 2008
In the laboratory, horseshoe crabs express a circadian rhythm of visual sensitivity as well as daily and circatidal rhythms of locomotion. The major goal of this investigation was to determine whether the circadian clock underlying changes in visual ...
Bedford, Lisa, Chabot, Christopher C., Watson, Winsor H., III   +2 more
core   +3 more sources

Sleep Deprivation in Mice: Looking Beyond the Slow Wave Rebound

Journal of Sleep Research, EarlyView.
ABSTRACT Sleep is a fundamental process supporting the dynamic regulation of neural function. Emerging methods have proposed that the aperiodic components of brain signals (such as the spectral slope, spectral intercept, and spectral knee), in addition to entropy‐based measures, offer robust empirical markers of neural states.
Tárek Zoltán Magyar, Orsolya Szalárdy, Róbert Bódizs   +2 more
wiley   +1 more source

No Evidence for Seasonal Variations in Fatigue, Sleepiness and Insomnia Symptoms: Spring Fatigue Is a Cultural Phenomenon Rather Than a Seasonal Syndrome

Journal of Sleep Research, EarlyView.
ABSTRACT Although not as prominent as in other animals, humans also experience seasonal variations in sleep duration and circadian processes. These variations are likely primarily driven by changes in photoperiod length. Anecdotally, many people report experiencing fatigue and low energy levels, particularly during spring in Germany, Switzerland and ...
Christine Blume, Albrecht Vorster
wiley   +1 more source

Translational applications of circadian research: connecting chronobiology to medicine

npj Biological Timing and Sleep
Chronobiology has advanced scientifically since 2000. Translating this knowledge and approach to medicine can alter diagnosis, treatment, and prevention, and improve health.
Elizabeth B. Klerman
doaj   +1 more source

An end-to-end framework for real-time automatic sleep stage classification. [PDF]

, 2018
Sleep staging is a fundamental but time consuming process in any sleep laboratory. To greatly speed up sleep staging without compromising accuracy, we developed a novel framework for performing real-time automatic sleep stage classification.
Ancoli-Israel, Sonia, Chee, Michael WL, Gooley, Joshua J, Ong, Ju Lynn, Patanaik, Amiya   +4 more
core   +1 more source

Chronobiological Aspects of Narcolepsy [PDF]

Sleep, 1994
The circadian, circasemidian and ultradian features of sleep-wake patterns in narcolepsy are reviewed with respect to the hypotheses that chronobiological disturbances might either be specific to the condition or contribute to its symptomatic profile.
Broughton, R., Mullington, J.
openaire   +3 more sources

Phenotypic Variability in Slow‐Wave Sleep in Depression: Associations With Clinical Profiles and Disorder Severity

Journal of Sleep Research, EarlyView.
ABSTRACT Slow‐wave sleep (SWS; stage N3) is often reported as reduced in depression, yet variability across depressive phenotypes remains poorly characterised. This study aimed to determine whether N3 architecture—proportion, duration, and latency—identifies clinically distinct profiles in major depressive episode (MDE).
Antoine Salmeron, Pierre A. Geoffroy, Lily Vissouze, Jeanne Leseur, Heloise Rach, Michel Lejoyeux, Justine Frija, Marie Pia d’Ortho, Julia Maruani   +8 more
wiley   +1 more source

Acute intermittent hypercapnic hypoxia augments left ventricular contractility

The Journal of Physiology, EarlyView.
Abstract figure legend Twenty‐four healthy adults were studied to determine the effects of an acute session of 40 min of intermittent hypercapnic hypoxia on cardiac performance. Cardiac function was assessed via echocardiography at rest and during graded stages of lower‐body negative pressure before and after the intervention to quantify load ...
Scott F. Thrall, Alex M. Williams, Philip J. Millar, Megan L. Lance, Brooke M. Shafer, Conan L. H. Shing, Jordan D. Bird, Christopher R. West, Glen E. Foster   +8 more
wiley   +1 more source