Results 61 to 70 of about 180,518 (204)

Correlations Between Adolescent Processing Speed and Specific Spindle Frequencies

Frontiers in Human Neuroscience, 2015
Sleep spindles are waxing and waning thalamocortical oscillations with accepted frequencies of between 11 and 16 Hz and a minimum duration of 0.5 seconds.
Rebecca S. Nader, Rebecca S. Nader, Carlyle T. Smith   +2 more
doaj   +1 more source

Local Aspects of Avian Non-REM and REM Sleep

Frontiers in Neuroscience, 2019
Birds exhibit two types of sleep that are in many respects similar to mammalian rapid eye movement (REM) and non-REM (NREM) sleep. As in mammals, several aspects of avian sleep can occur in a local manner within the brain.
N. Rattenborg, J. van der Meij, Gabriel J. L. Beckers, John A. Lesku   +3 more
semanticscholar   +1 more source

Modelos ortogonais para a estimativa multivariada de VAR (Value-at-risk) para risco de mercado: um estudo de caso comparativo

Revista de Economia Mackenzie, 2011
O presente trabalho tem como objetivo explorar diferentes modelos de estimativa da distribuição conjunta de fatores para risco de mercado, com ênfase nos modelos ortogonais. Foram explorados cinco modelos: 1.
João Luiz Chela, Jean Carlos Abrahão, Luiz Fernando Ohara Kamogawa   +2 more
doaj  

REM sleep’s unique associations with corticosterone regulation, apoptotic pathways, and behavior in chronic stress in mice

Proceedings of the National Academy of Sciences of the United States of America, 2019
Significance Sleep disturbances are common in stress-related disorders but the nature of these sleep disturbances and how they relate to changes in the stress hormone corticosterone and changes in gene expression remained unknown.
M. Nollet, H. Hicks, Andrew P McCarthy, Hui-Hai Wu, C. Möller-Levet, E. Laing, K. Malki, Nathan Lawless, K. Wafford, D. Dijk, R. Winsky-Sommerer   +10 more
semanticscholar   +1 more source

The effects of Valerian on sleep spindles in a model of neuropathic pain [PDF]

Sleep Science
Introduction: Valeriana officinalis is known to be one of the most famous herbal supplements for the treatment of anxiety and insomnia. Despite its widespread use in most countries all around the world, there is little scientific information and research
Ashkan Soltani, Farideh Bahrami, Zahra Bahari, Zeinab Shankayi, Mehdi Graily-Afra, Hedayat Sahraei   +5 more
doaj   +1 more source

Fur Seals Suppress REM Sleep for Very Long Periods without Subsequent Rebound

Current Biology, 2018
SUMMARY Virtually all land mammals and birds have two sleep states: slow-wave sleep (SWS) and rapid eye movement (REM) sleep [1, 2]. After deprivation of REM sleep by repeated awakenings, mammals increase REM sleep time [3], supporting the idea that REM ...
O. Lyamin, P. O. Kosenko, S. M. Korneva, A. Vyssotski, L. Mukhametov, J. Siegel   +5 more
semanticscholar   +1 more source

Muscarinic Acetylcholine Receptors Chrm1 and Chrm3 Are Essential for REM Sleep.

Cell Reports, 2018
Sleep regulation involves interdependent signaling among specialized neurons in distributed brain regions. Although acetylcholine promotes wakefulness and rapid eye movement (REM) sleep, it is unclear whether the cholinergic pathway is essential (i.e ...
Y. Niwa, Genki N. Kanda, Rikuhiro G. Yamada, S. Shi, Genshiro A. Sunagawa, Maki Ukai-Tadenuma, H. Fujishima, N. Matsumoto, Koh-hei Masumoto, M. Nagano, T. Kasukawa, James Galloway, Dimitri Perrin, Y. Shigeyoshi, Hideki Ukai, H. Kiyonari, Kenta Sumiyama, H. Ueda   +17 more
semanticscholar   +1 more source

Hibernation in a primate: does sleep occur? [PDF]

Royal Society Open Science, 2016
During hibernation, critical physiological processes are downregulated and thermogenically induced arousals are presumably needed periodically to fulfil those physiological demands.
Marina B. Blanco, Kathrin H. Dausmann, Sheena L. Faherty, Peter Klopfer, Andrew D. Krystal, Robert Schopler, Anne D. Yoder   +6 more
doaj   +1 more source

Local hippocampal fast gamma rhythms precede brain-wide hyperemic patterns during spontaneous rodent REM sleep

Nature Communications, 2018
Rapid eye movement sleep (REMS) is a peculiar brain state combining the behavioral components of sleep and the electrophysiological profiles of wake. After decades of research our understanding of REMS still is precluded by the difficulty to observe its ...
Antoine Bergel, T. Deffieux, C. Demené, M. Tanter, Ivan Cohen   +4 more
semanticscholar   +1 more source

REM Obstructive Sleep Apnea: Risk for Adverse Health Outcomes and Novel Treatments

Sleep and Breathing, 2018
Rapid eye movement (REM) sleep was discovered nearly 60 years ago. This stage of sleep accounts for approximately a quarter of total sleep time in healthy adults, and it is mostly concentrated in the second half of the sleep period.
A. Varga, B. Mokhlesi
semanticscholar   +1 more source