All Stories

  1. How to quantify sleepiness during an attempt to sleep?
  2. Weekday and weekend sleep times across the human lifespan: a model-based simulation
  3. The yin and yang of two opponent processes of sleep-wake regulation: Sex-associated differences in the spectral EEG markers of the drives for sleep and wake
  4. Two Old Wild-Type Strains of Drosophila melanogaster Can Serve as an Animal Model of Faster and Slower Aging Processes
  5. Can the Brain’s Thermostatic Mechanism Generate Sleep-Wake and NREM-REM Sleep Cycles? A Nested Doll Model of Sleep-Regulating Processes
  6. Sleep and Circadian Rhythms: Alpha Rhythm and Alertness/Sleepiness
  7. A relay model of human sleep stages
  8. Reaction of the endogenous regulatory mechanisms to early weekday wakeups: a review of its popular explanations in light of model-based simulations
  9. A Review of Evidence for the Involvement of the Circadian Clock Genes into Malignant Transformation of Thyroid Tissue
  10. Aging, Sleep and Sleepiness Self-Assessment, and the Underlying Drives for Sleep and Wake
  11. Evening chronotype, insufficient weekday sleep, and weekday-weekend gap in sleep times: What is really to blame for a reduction in self-perceived health among university students?
  12. Motus Vita Est: Fruit Flies Need to Be More Active and Sleep Less to Adapt to Either a Longer or Harder Life
  13. Obituary for Dr. Konstantin Danilenko (19.03.1962–18.01.2023)
  14. Can physiological sleepiness underlie consciously perceived sleepiness assessed with the Epworth sleepiness scale?
  15. Prevalence of Insomnia and Sleep Habits during the First and Second Wave of COVID-19 in Belgium
  16. “Struggle” between three switching mechanisms as the underpinning of sleep stages and the pattern of transition between them
  17. Sleep of Poor and Good Nappers Under the Afternoon Exposure to Very Weak Electromagnetic Fields
  18. Prospects of Testing Diurnal Profiles of Expressions of TSH-R and Circadian Clock Genes in Thyrocytes for Identification of Preoperative Biomarkers for Thyroid Carcinoma
  19. The Irrecoverable Loss in Sleep on Weekdays of Two Distinct Chronotypes Can Be Equalized by Permitting a >2 h Difference in Waking Time
  20. Weekend sleep after early and later school start times confirmed a model-predicted failure to catch up sleep missed on weekdays
  21. What Can Make the Difference Between Chronotypes in Sleep Duration? Testing the Similarity of Their Homeostatic Processes
  22. Linking stages of non-rapid eye movement sleep to the spectral EEG markers of the drives for sleep and wake
  23. Sleep during “lockdown” highlighted the need to rethink the concept of weekend catch-up sleep
  24. Quo Vadis, Chronopsychology?
  25. When early and late risers were left to their own devices: six distinct chronotypes under “lockdown” remained dissimilar on their sleep and health problems
  26. A six-factor structure of individual variation in the tendencies to become sleepy and to sleep at different times of the day
  27. Association between the Effects of High Temperature on Fertility and Sleep in Female Intra-Specific Hybrids of Drosophila melanogaster
  28. Differences between male and female university students in sleepiness, weekday sleep loss, and weekend sleep duration
  29. Chronobiological traits predict the restrained, uncontrolled, and emotional eating behaviors of female university students
  30. Overlap between individual variation in personality traits and sleep-wake behavior
  31. Phase transitions in superconductor/ferromagnet bilayer driven by spontaneous supercurrents
  32. Differential relationship of two measures of sleepiness with the drives for sleep and wake
  33. One click - 6 chronotypes
  34. Камо грядеше, хронопсихология?
  35. Age- and gender-associated differences in the sleepy brain’s electroencephalogram
  36. Sleep Satisfaction, Sleep–Wake Pattern, and Aging
  37. Effects of Exposure to a Weak Extremely Low Frequency Electromagnetic Field on Daytime Sleep Architecture and Length
  38. There is more to chronotypes than larks and owls. evidence of two additional chronotypes in humans from a large scale community-based survey
  39. Evening chronotype, late weekend sleep times and social jetlag as possible causes of sleep curtailment after maintaining perennial DST: ain’t they as black as they are painted?
  40. There is more to chronotypes than evening and morning types
  41. Napping between scylla and charybdis of N1 and N3: latency to N2 in a brief afternoon nap can be reduced by binaural beating
  42. Can we feel like being neither alert nor sleepy? The electroencephalographic signature of this subjective sub-state of wake state yields an accurate measure of objective sleepiness level
  43. Model-based simulations of weekday and weekend sleep times self-reported by larks and owls
  44. Simulation of the Ontogeny of Social Jet Lag: A Shift in Just One of the Parameters of a Model of Sleep-Wake Regulating Process Accounts for the Delay of Sleep Phase Across Adolescence
  45. Association of obesity in shift workers with the minor allele of a single-nucleotide polymorphism (rs4851377) in the largest circadian clock gene (NPAS2)
  46. A cross-sectional study of retrospectively reported seasonality in native and non-native residents of Chukotka and Turkmenistan
  47. Larks, owls, swifts, and woodcocks among fruit flies: differential responses of four heritable chronotypes to long and hot summer days
  48. Genetic-based signatures of the latitudinal differences in chronotype
  49. Treatments with thousands therapeutic doses of meldonium failed to alter the Drosophila’s circadian clocks but negatively affected the germination of Pisum’s seeds
  50. Differential spectrum approach to uncovering the electroencephalographic signatures of the opponent driving forces for sleep and wake underlying alternations of sleep and wake states
  51. How have our clocks evolved? Adaptive and demographic history of the out-of-African dispersal told by polymorphic loci in circadian genes
  52. Age-related changes in the association of sleep satisfaction with sleep quality and sleep–wake pattern
  53. An hour in the morning is worth two in the evening: association of morning component of morningness–eveningness with single nucleotide polymorphisms in circadian clock genes
  54. Associations of depression and seasonality with morning-evening preference: Comparison of contributions of its morning and evening components
  55. State- and trait-like variation in morning and evening components of morningness–eveningness in winter depression
  56. Blessed are the meek for they shall inherit the earth: quietness component of introversion is associated with single nucleotide polymorphisms in two circadian clock genes
  57. Introversion and a single nucleotide polymorphism in PER3 gene: demure female students prevail among carriers of the rare allele
  58. Association of an individual's ability to overcome desire to fall asleep with a higher anterior-posterior gradient in electroencephalographic indexes of sleep pressure
  59. Owls, larks, swifts, woodcocks and they are not alone: A historical review of methodology for multidimensional self-assessment of individual differences in sleep-wake pattern
  60. A pilot replication study of two PER3 single nucleotide polymorphisms as potential genetic markers for morning and evening earliness-lateness
  61. Retrospectively reported month-to-month variation in sleeping problems of people naturally exposed to high-amplitude annual variation in daylength and/or temperature
  62. Validation of Nighttime Sleepability Scale Against Objective and Subjective Measures of Sleep Quality
  63. A 3-D Look at the Russian Personality Traits Structure
  64. J. M. Waterhouse 2 August 1944–26 October 2016†
  65. Reliability and external validity of the six scales of 72-item Sleep-Wake Pattern Assessment Questionnaire (SWPAQ)
  66. Generalizability of Frequency Weighting Curve for Extraction of Spectral Drowsy Component From the EEG Signals Recorded in Eyes-Closed Condition
  67. Spectral EEG indicator of pressure to enter into deep sleep: its responsiveness to closing the eyes for just a few minutes exhibits a pure exponential buildup during sleep deprivation
  68. Evidence for age-associated disinhibition of the wake drive provided by scoring principal components of the resting EEG spectrum in sleep-provoking conditions
  69. Time course of a new spectral electroencephalographic marker of sleep homeostasis
  70. Three-dimensional structural representation of the sleep-wake adaptability
  71. Sleep-Wake Adaptability Test
  72. Editorial (Mini-Thematic Issue: Effects of Aging on Circadian and Sleep Timing)
  73. Age-associated Advance of Sleep Times Relative to the Circadian Phase of Alertness-sleepiness Rhythm: Can it be Explained by Changes in Ratios Between Strengths of the Underlying Oscillatory Processes?
  74. Gender Difference in Timing of Nocturnal Rise of Subjective Sleepiness
  75. Extraction of spectral drowsy component from the resting electroencephalographic signal for quick, objective and direct testing of sleepiness in absolute terms
  76. Can sleepiness be evaluated quickly, directly, objectively, and in absolute terms?
  77. Empirical evaluation of a model-driven approach to enlargement of multi-dimensional questionnaires for assessing adaptability of the sleep–wake cycle
  78. How many diurnal types are there? A search for two further “bird species”
  79. Principal component analysis of the EEG spectrum can provide yes-or-no criteria for demarcation of boundaries between NREM sleep stages
  80. Physiological Sleep Propensity Might Be Unaffected by Significant Variations in Self-Reported Well-Being, Activity, and Mood
  81. Lateness, Awake and Sleep-abilities Inventory
  82. Principal component scoring of the resting EEG spectrum provides further evidence for age-associated disinhibition of the wake drive
  83. Chronobiology and Sleep
  84. Alpha attenuation soon after closing the eyes as an objective indicator of sleepiness
  85. Three dimensions of individual variation in phase angle between sleep timing and timing of nocturnal rise of the feeling of sleepiness
  86. Calibration of an objective alertness scale
  87. When does this cortical area drop off? Principal component structuring of the EEG spectrum yields yes-or-no criteria of local sleep onset
  88. What were “owls” doing in our ancestral photoperiodic environment? Chronobiological account for the evolutionary advantage of nocturnal lifestyle
  89. Rapid Changes in Scores on Principal Components of the EEG Spectrum do not Occur in the Course of “Drowsy” Sleep of Varying Length
  90. Overall and specific interrelationships between inter-individual variations in personality and sleep-wake adaptability
  91. Phase Difference Between Chronotypes in Self-Reported Maximum of Alertness Rhythm
  92. Sleep EEG aging
  93. A simplified approach to model-based analysis of the ultradian sleep homeostasis through fitting time courses of its eeg indicators obtained across routine clinical sleep lab recordings of all-night sleep and multiple 20-min napping attempts
  94. Simulation of an ultradian sleep homeostasis through fitting time courses of its EEG indicators obtained during baseline recordings of night sleep
  95. The EEG indicators of the dynamic properties of sleep–wake regulating processes: comparison of the changes occurring across wake–sleep transition with the effects of prolonged wakefulness
  96. Construction and validation of the EEG analogues of the Karolinska sleepiness scale based on the Karolinska drowsiness test
  97. Rapid changes in scores on the two largest principal components of the electroencephalographic spectrum demarcate the boundaries of drowsy sleep
  98. Overall and specific relationships between inter-individual variations in personality and sleep–wake adaptability
  99. Patterns of Association of Health Problems with Sleep- Wake Timing and Duration
  100. The first and second principal components of the EEG spectrum as the correlates of sleepiness
  101. Quantification of Sleepiness Through Principal Component Analysis of the Electroencephalographic Spectrum
  102. Prospects of using electroencephalographic signatures of the chronoregulatory processes for meaningful, parsimonious and quantitative description of the sleep–wake sub-states
  103. Principal Components of Electroencephalographic Spectrum as Markers of Opponent Processes Underlying Ultradian Sleep Cycles
  104. Principal component structure of wake-sleep transition
  105. Analysis of spatio-temporal structure of EEG-activity to form an objective assessment of the individual characteristics of the sleep-wake behavior
  106. Associations of waking EEG structure with chronotype and trototype of 130 sleep deprived individuals
  107. Structuring the inter-individual variation in waking EEG can help to discriminate between the objective markers of sleep debt and sleep pressure
  108. Gender differences in morning and evening lateness
  109. Association of morning and evening lateness with self-scored health: Late to bed and early to rise makes a man healthy in his own eyes
  110. A new SWPAQ's scale predicts the effects of sleep deprivation on the segmental structure of alpha waves
  111. Construction of a pyrido[4,3-d]pyrimidine system on the basis of N-cyanobenzamidine and diethyl acetone-1,3-dicarboxylate
  112. Segmental structure of alpha waves in sleep-deprived subjects
  113. Introduction of the tetra-circumplex criterion for comparison of the actual and theoretical structures of the sleep – wake adaptability
  114. Big six of the individual adaptive ability of the sleep-wake cycle: Explanation and measurement
  115. Sleep and Circadian Neuroendocrine Function in Seasonal Affective Disorder
  116. Antidepressant effects of combination of sleep deprivation and early evening treatment with melatonin or placebo for winter depression
  117. Antidepressant effects of mono- and combined non-drug treatments for seasonal and non-seasonal depression
  118. Antidepressant effects of light therapy and “natural” treatments for winter depression
  119. Melatonin Treatment of Winter Depression Following Total Sleep Deprivation: Waking EEG and Mood Correlates
  120. Automated, real-time calibration of the respiratory inductance plethysmograph and its application in newborn infants
  121. Menstrual Phase Response to Nocturnal Light
  122. Rate of Oxygen Consumption in Seasonal and Non-Seasonal Depression
  123. Mood and energy regulation in seasonal and non-seasonal depression before and after midday treatment with physical exercise or bright light
  124. The Sympatho-Adrenal and Energy-Regulating Systems in Winter Depression
  125. Multi-Component Physiological Response Mediates Therapeutic Benefits of Bright Light in Winter Seasonal Affective Disorder
  126. Effects of the Seasons and of Bright Light Administered at Different Times of Day on Sleep EEG and Mood in Patients with Seasonal Affective Disorder
  127. Phase Typing of Patients with Seasonal Affective Disorder: A Test for the Phase Shift Hypothesis
  128. The Importance of Full Summer Remission as a Criterion for the Diagnosis of Seasonal Affective Disorder
  129. Timing of sleep modelling: Circadian modulation of the homeostatic process
  130. Properties of the two‐peak free running circadian rhythm of locomotor activity of the sand desert beetleTrigonoscelis gigasreitt
  131. Diurnal and seasonal variations in cortisol, prolactin, TSH and thyroid hormones in women with and without seasonal affective disorder
  132. Hemispheric language lateralization in seasonal affective disorder and light treatment
  133. Phase of Melatonin Rhythm in Winter Depression