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Between Fajr and Isha: Understanding Sleep Dynamics in Islamic Prayer Timings and Astronomical Considerations.
Cureus
April 2024
Infectious Diseases, Beaumont Hospital, Taylor, USA.
The interplay between Islamic prayer timings, particularly Fajr (the predawn prayer) and Isha (the night prayer), and sleep health is a critical area of study, revealing the significant impact of these religious practices on sleep patterns. Astronomical calculations used to determine these prayer times involve observing the sun's position relative to the horizon at specific degrees of twilight, which can vary, potentially leading to differences in sleep duration and quality among Muslims. This variation is influenced by factors like geography and seasonality, especially in regions far from the equator where daylight hours shift dramatically.
View Article and Find Full Text PDF"The highest in each class was a twilight baby": scientific motherhood, twilight sleep and the eugenics movement in .
Med Humanit
August 2024
English Language and Literature, University of Waterloo, Waterloo, Ontario, Canada.
In the early twentieth century, childbirth was increasingly being viewed as a medical experience in North America. Women were encouraged to engage with 'scientific motherhood' by adhering to medical advice and undergoing the latest medical and technological interventions. Two movements simultaneously emerged that engaged with scientific motherhood: the positive eugenics movement, which sought to encourage reproduction among specific groups, and the twilight sleep movement, which promoted the use of pain management during childbirth.
View Article and Find Full Text PDFA subclass of evening cells promotes the switch from arousal to sleep at dusk.
Curr Biol
May 2024
Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Neurology, Johns Hopkins University, Baltimore, MD 21205, USA. Electronic address:
Animals exhibit rhythmic patterns of behavior that are shaped by an internal circadian clock and the external environment. Although light intensity varies across the day, there are particularly robust differences at twilight (dawn/dusk). These periods are also associated with major changes in behavioral states, such as the transition from arousal to sleep.
View Article and Find Full Text PDFThe importance of residential dusk and dawn light exposure for sleep quality, health, and well-being.
Sleep Med Rev
December 2023
Jönköping University, School of Engineering, Jönköping, Sweden. Electronic address:
Light exposure during twilight plays a critical role in the entrainment of the human circadian system. People are most often at home during dusk and dawn, and light exposure at home - either natural or from electric light - may therefore contribute substantially to sleep and well-being. However, very little research has focused on the effects of home lighting on sleep and well-being, and even less research has investigated the effects of light exposure during twilight.
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