نتایج جستجو برای: sleep stages

تعداد نتایج: 295823  

Journal: :health, spirituality and medical ethics journal 0
mohammad reza heidari shahed university reza norouzadeh shahed university mohammad abbasi 2qom medical sciences university

background and objectives: sleep is a sign of the greatness of god. in this article sleep is described from quran and modern health sciences. methods: this is a qualitative systematic review. data were gathered from the quran, related islamic narratives and literatures. words that were searched included sleep,sleep stages, subaat, hojoo, ruqood, nu’ass, sinah. results: the results showed that t...

Journal: :World journal of pediatrics : WJP 2011
Lars Eckehard Meyer Thomas Erler

BACKGROUND This study was undertaken to compare the sleep profiles of healthy infants in swaddling and sleeping bag conditions. METHODS Polysomnographs of 85 healthy infants (40 in the study group, 45 in the control group) with a mean age of 7.5 weeks were recorded in the sleeping laboratory. A positive decision from the local Ethics Committee and the written consent of the parents were obtai...

2013
Achim Lewandowski Roman Rosipal Georg Dorffner

Research in recent years has supported the hypothesis that many properties of the electroencephalogram (EEG) are specific to an individual. In this study, the intra- and inter-individual variations of sleep EEG signals were investigated. This was carried out by analyzing the stability of the average EEG spectra individually computed for the Rechtschaffen and Kales (RK) sleep stages. Six EEG cha...

Journal: :Sleep 1986
B Kemp H A Kamphuisen

A Markov chain model has been proposed as a mechanism that generates human sleep stages. A method for estimating the parameters of the model, i.e., the transition probabilities (rates) between sleep stages, has been introduced and applied to 95 hypnograms taken from 23 subjects. The rates characterize interindividual differences and nightly variations of the sleep mechanism, related to sleep-on...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2011
Eckehard Olbrich Peter Achermann Thomas Wennekers

'Complexity science' is a rapidly developing research direction with applications in a multitude of fields that study complex systems consisting of a number of nonlinear elements with interesting dynamics and mutual interactions. This Theme Issue 'The complexity of sleep' aims at fostering the application of complexity science to sleep research, because the brain in its different sleep stages a...

Journal: :Current opinion in neurobiology 2013
Robert Stickgold

It would be nice if we could talk about sleep and memory as if there were only one type of memory and one type of sleep. But this is far from the case. Sleep and memory each comes in many forms, and furthermore, memories can go through multiple forms of post-encoding processing that must be individually addressed. Finally, sleep stages per se do not affect memories. Rather, the neuromodulatory ...

2016
Michael Joseph Lavery Carolyn Stull Michael Owen Kinney Gil Yosipovitch

Chronic pruritus is a debilitating condition with numerous etiologies. Many patients suffer from nocturnal pruritus, which can decrease quality of life and affect mortality in hemodialysis patients. Nocturnal pruritus may occur in all sleep stages but is most prevalent in stages N1 and N2. Further research is needed to elucidate the pathophysiology of nocturnal itch, which will aid in the devel...

Journal: :Journal of clinical research in pediatric endocrinology 2015
Andrea Granados Achamyeleh Gebremariam Joyce M Lee

Growth and pubertal development are important health markers. We used the data of a longitudinal growth study on a contemporary sample of US youth to examine the relationship between peak height velocity (PHV) and Tanner staging. We observed a substantial variability in the timing of PHV across Tanner stages, which is an important consideration for clinicians when assessing growth.

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2015
A Schlemmer U Parlitz S Luther N Wessel T Penzel

Transition patterns between different sleep stages are analysed in terms of probability distributions of symbolic sequences for young and old subjects with and without sleep disorder. Changes of these patterns due to ageing are compared with variations of transition probabilities due to sleep disorder.

Journal: :journal of health sciences and surveillance system 0
mahin nazari department of health education and promotion, school of health, shiraz university of medical sciences, shiraz, iran; mostafa taheri student health education and promotion, school of health, shiraz university of medical sciences, shiraz, iran; sareh keshavarzi department of epidemiology, school of health, shiraz university of medical sciences, shiraz, iran; ali javadpour department of psychiatry, hafez hospital. shiraz university of medical sciences. shiraz. iran

background: although sleeping problems are common among all age groups, the elderly suffer a higher prevalence of sleep disorders. the present study aimed to investigate the relationship between sleep quality, self-efficacy, and stages of change among the elderly. methods: this descriptive-analytical study was conducted on 36 individuals aged 60-75 years selected through simple random sampling ...

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