Results 61 to 70 of about 17,879 (182)
An eye on long‐duration spaceflight: Controversies, countermeasures and challenges
Experimental Physiology, EarlyView.Abstract Space flight‐associated neuroocular syndrome (SANS) is a consequence of long‐duration space flight and is detected in two‐thirds of astronauts. In‐flight, this can cause a change in the refraction of the eyes, requiring graded hypermetropic ‘superfocus adjustable’ glasses, optic nerve head oedema and choroidal folds.
Vincent Wing Sum Ng +1 more
wiley +1 more source
In vitro muscle contraction: A technical review on electrical pulse stimulation in C2C12 cells
Experimental Physiology, EarlyView.Abstract Electrical pulse stimulation (EPS) of skeletal muscle cells is increasingly used to model exercise In vitro. The murine C2C12 myotube system has become a common platform for such studies, yet wide variability in EPS protocols hampers reproducibility and cross‐study comparisons.
Mark R. C. van de Meene +4 more
wiley +1 more source
Riding the Rhythm of Melatonin Through Pregnancy to Deliver on Time
Frontiers in Endocrinology, 2019 Pregnancy is influenced by the circadian (“circa” or approximately; diēm or day) system, which coordinates physiology and behavior with predictable daily changes in the environment such as light/dark cycles.
Ronald McCarthy +5 more
doaj +1 more source
Journal of Pineal Research, Volume 78, Issue 5, September 2026.ABSTRACT Melatonin is synthesised from tryptophan by the sequential action of enzymes that are highly expressed in the pineal gland. Homeobox gene‐encoded transcription factors typically control organ development; however, a set of homeobox genes is strongly expressed in the adult pineal gland.
Nicole Anne Morrissey +5 more
wiley +1 more source
The choroid plexus is an important circadian clock component
Nature Communications, 2018 The suprachiasmatic nucleus (SCN) has been thought of as the master circadian clock, but peripheral circadian clocks do exist. Here, the authors show that the choroid plexus displays oscillations more robust than the SCN and that can be described as a ...
Jihwan Myung +10 more
doaj +1 more source
American Journal of Human Biology, Volume 38, Issue 8, August 2026.ABSTRACT Objectives Circadian rhythms influence activity cycles in humans, and circadian rhythm disruption (CRD) can negatively impact cardiometabolic disease risk and microbiome composition. This study documented CRD in a sample of nurses in Philadelphia, examining connections between CRD, disease risk, and work environment factors, proposing the ...
Clare Super +4 more
wiley +1 more source
The Suprachiasmatic Nucleus, Circadian Clocks, and the Liver [PDF]
Diabetes, 2013 The circadian clock system adapts phasic physiological activities, such as sleeping and eating, to environmental cycles. The “master clock” is in the suprachiasmatic nucleus (SCN) and the principal cue (Zeitgeber) is the light–dark cycle, around which most mammalian (and those of all living organisms) functions have evolved.
openaire +2 more sources
Brain and Behavior, Volume 16, Issue 8, August 2026.ABSTRACT Introduction Pituitary neuroendocrine tumors (PitNETs) account for up to 15% of intracranial tumors. Patients commonly present with various emotional and cognitive impairments, including a high prevalence of anxiety and depression. Therefore, this study aimed to identify the latent subtypes of negative emotions in patients with PitNETs and ...
Lei Jin +7 more
wiley +1 more source
Clinical Cardiology, Volume 49, Issue 8, August 2026.This study retrospectively analyzed the characteristics of blood pressure rhythm after emergency PCI for patients with anterior STEMI, discovering the burden of disrupted BP circadian rhythm. The reverse dipper BP rhythm may serve as an independent factor of MACE.
Yangge Shao +4 more
wiley +1 more source
The Role of Mammalian Glial Cells in Circadian Rhythm Regulation
Neural Plasticity, 2017 Circadian rhythms are biological oscillations with a period of about 24 hours. These rhythms are maintained by an innate genetically determined time-keeping system called the circadian clock.
Donají Chi-Castañeda, Arturo Ortega
doaj +1 more source