...Rhea Lakhiani; Sahana Shanavas; Krishna Melnattur ABSTRACT Sleep is a familiar, periodic occurrence in our lives. Despite its place in everyday experience, the existence of this suspended state of consciousness has intrigued and puzzled philosophers and scientists for decades. For much of its...

...Sjoerd J. van Hasselt; Theunis Piersma; Peter Meerlo ABSTRACT Sleep is a widely spread phenomenon in the animal kingdom and is thought to serve important functions. Yet, the function of sleep remains an enigma. Studies in non-model animal species in their natural habitat might provide more insight...

...Oluwaseun M. Ajayi; Justin M. Marlman; Lucas A. Gleitz; Evan S. Smith; Benjamin D. Piller; Justyna A. Krupa; Clément Vinauger; Joshua B. Benoit ABSTRACT Sleep is an evolutionarily conserved process that has been described in different animal systems. For insects, sleep characterization has been...

...Wesley I. Payette; Brett L. Hodinka; Keelee B. Pullum; Melanie M. Richter; Noah T. Ashley ABSTRACT Sleep loss impairs cognitive function, immunological responses and general well-being in humans. However, sleep requirements in mammals and birds vary dramatically. In circumpolar regions...

... different sleep stages. Respiratory phenotype of male orexin knockout (KO-ORX, N =9) and wild-type (WT, N =8) mice was studied at thermoneutrality ( T a =30°C) or during mild cold exposure ( T a =20°C) inside a whole-body plethysmography chamber. The states of wakefulness (W), non-rapid eye movement sleep...

... reduced night-time sleep and greater sleep fragmentation. ACER may thus be part of a signalling system linking metabolism with sleep. To further understand the role of ACER in response to diet, we measured sleep and other nutrient-responsive phenotypes in Acer null flies under different dietary conditions...

...Leonie Kirszenblat; Deniz Ertekin; Joseph Goodsell; Yanqiong Zhou; Paul J. Shaw; Bruno van Swinderen ABSTRACT Although sleep deprivation is known to impair attention in humans and other mammals, the underlying reasons are not well understood, and whether similar effects are present in non-mammalian...

... Urban ecology ALAN Hormones Metabolism Stress Sleep Glucocorticoid Thyroid Melatonin Organisms have evolved under a natural dark and light cycle for millions of years, so their ability to survive and reproduce depends on not only occupying a favorable spatial niche but also an optimal...

... Learning Nutrition Foraging Nutritional deficit Sleep Timing of learning Early development is crucial in shaping life history traits ( Huchard et al., 2016 ; Lindström, 1999 ; Metcalfe and Monaghan, 2001 ). Conditions experienced during early life, when all physiological and morphological...

...James Jaggard; Beatriz G. Robinson; Bethany A. Stahl; Ian Oh; Pavel Masek; Masato Yoshizawa; Alex C. Keene ABSTRACT Sleep is an essential behavior exhibited by nearly all animals, and disruption of this process is associated with an array of physiological and behavioral deficits. Sleep is defined...

... in several laboratory environments and was shown to be a robust feature of mated, but not virgin, female flies. Both males and virgin females kept on a 12 h light:12 h dark (12LD) cycle and constant temperature displayed night-time inactivity (sleep) followed by weak activity in the morning, an afternoon...

...Pavel Masek; Lauren A. Reynolds; Wesley L. Bollinger; Catriona Moody; Aradhana Mehta; Kazuma Murakami; Masato Yoshizawa; Allen G. Gibbs; Alex C. Keene Animals respond to changes in food availability by adjusting sleep and foraging strategies to optimize their fitness. Wild populations of the fruit...

...Lisa Beyaert; Uwe Greggers; Randolf Menzel SUMMARY Sleep is known to support memory consolidation in animals, including humans. Here we ask whether consolidation of novel navigation memory in honeybees depends on sleep. Foragers were exposed to a forced navigation task in which they learned to home...

...Richard Stephenson; Vern Lewis SUMMARY The objective of this study was to determine whether the great pond snail, Lymnaea stagnalis , expresses a sleep-like behavioural state. We found that snails spontaneously enter a relatively brief (22±1 min) quiescent state characterized by postural relaxation...

...Barrett A. Klein; Kathryn M. Olzsowy; Arno Klein; Katharine M. Saunders; Thomas D. Seeley SUMMARY Sleep is a dynamic phenomenon that changes throughout an organism's lifetime, relating to possible age- or task-associated changes in health,learning ability, vigilance and fitness. Sleep has been...

...Ada D. Eban-Rothschild; Guy Bloch SUMMARY Honeybee ( Apis mellifera ) foragers are among the first invertebrates for which sleep behavior has been described. Foragers (typically older than 21 days) have strong circadian rhythms; they are active during the day, and sleep during the night. We...

...Richard Stephenson; Karen M. Chu; James Lee SUMMARY Rats respond to sustained sleep deprivation with increased mortality preceded by a rise in resting metabolic rate that may or may not be attributed to dysfunction of the thermoregulatory system. The present study was designed to test...

...-mail: [email protected] ) * Present address: Center for Sleep Research, UCLA/VA-GLAHS, Neurobiology Research 151-A3, 16111 Plummer Street, North Hills, CA 91343, USA 29 7 2004 © The Company of Biologists Limited 2004 2004 apnoea eupnoea respiration heart rate bradycardia sleep...