Results 71 to 80 of about 11,678 (220)

Salivary melatonin onset in youth at familial risk for bipolar disorder [PDF]

open access: yes, 2019
Melatonin secretion and polysomnography (PSG) were compared among a group of healthy adolescents who were at high familial risk for bipolar disorder (HR) and a second group at low familial risk (LR).
Armitage, Roseanne   +13 more
core   +2 more sources

Impaired Insulin Profiles Following a Single Night of Sleep Restriction: The Impact of Acute Sprint Interval Exercise [PDF]

open access: yes, 2020
Experimental sleep restriction (SR) has demonstrated reduced insulin sensitivity in healthy individuals. Exercise is well-known to be beneficial for metabolic health.
Ellis, Jason   +5 more
core   +2 more sources

Chronotype in migraine and tension‐type headache: A population study

open access: yesHeadache: The Journal of Head and Face Pain, Volume 66, Issue 5, Page 1037-1049, May 2026.
Abstract Objectives This study was designed to examine the distribution of chronotypes among individuals with migraine and tension‐type headache and to evaluate the association between chronotype and clinical headache characteristics in a population‐based sample. Background Although previous research has demonstrated associations between chronotype and
Da Eun Jung   +4 more
wiley   +1 more source

Orbitofrontal gray matter relates to early morning awakening: a neural correlate of insomnia complaints? [PDF]

open access: yes, 2012
Sleep complaints increase profoundly with age; prevalence estimates of insomnia in elderly people reach up to 37%. The three major types of nocturnal complaints are difficulties initiating sleep (DIS), difficulties maintaining sleep (DMS) and early ...
Brenda W.H.J. Penninx   +10 more
core   +4 more sources

Prolonged morning wake transitions associated with amyloid beta burden: A cross‐sectional pilot study

open access: yesAlzheimer's &Dementia, Volume 22, Issue 4, April 2026.
Abstract INTRODUCTION Sleep quality critically influences amyloid beta (Aβ) clearance, yet the specific role of morning wake transition duration remains unexplored. METHODS This hypothesis‐driven secondary analysis examined 97 cognitively unimpaired older adults (mean age ± SD: 74.4 ± 5.8 years) who underwent 14‐day actigraphy and 18F‐florbetapir ...
Georg von Fingerhut   +6 more
wiley   +1 more source

The Sleepy Teenager – Diagnostic Challenges [PDF]

open access: yes, 2014
The sleepy teenager puts the doctor in a, often tricky, situation where it must be decided if we deal with normal physiology or if we should suspect pathological conditions. What medical investigations are proper to consider?
Anne-Marie Landtblom, Maria Engström
core   +2 more sources

Subjective and Objective Sleep Measures in Patients With Insomnia With and Without Depression

open access: yesBrain and Behavior, Volume 16, Issue 4, April 2026.
While current depressive symptoms are associated primary with subjective sleep quality parameters, depressive disorder as a trait is linked to objective changes of the sleep architecture. All measures controlled for confounders (age, sex, comorbidities, medication).
Tina Carbonetti   +8 more
wiley   +1 more source

Ciradian dysrhythmias in the EEG of children with clonazepam treatment [PDF]

open access: yes, 1984
The effects of different anticonvulsants on the system of cir-cadian and ultradian rhythms in the EEG of children was investigated in ten 24*-h recordings of children with different forms of epilepsy.
Arbogast, B.   +4 more
core   +1 more source

Сон в Антарктиде: от проблем с засыпанием до понимания проблем [PDF]

open access: yes, 2020
From the fi rst expeditions, adaptation to the harsh environment of Antarctica, the expeditionists complained of a trouble sleeping. During a long stay on the continent, the polar explorers are exposed to a large number of extreme environmental factors ...
Бабийчук, Г.А.   +4 more
core   +1 more source

Timing is everything: Expert opinion on researching epilepsy rhythms by the ILAE Task Force on Chronobiology

open access: yesEpilepsia, Volume 67, Issue 4, Page 1544-1554, April 2026.
Abstract Recurrent seizures, the hallmark of epilepsy, are influenced by rhythms operating over multiple timescales. Chronobiology is the study of biological timing that aims to explain temporal patterns of events like seizures. Fueled by recent advances in genetics, computational modeling, and device engineering, the chronobiology of epilepsy is now a
Maxime O. Baud   +4 more
wiley   +1 more source

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