1.65 Seguro para instalar
Sleep
The timing and progression of the sleep cycle and the total amount of nightly sleep required for optimal health varies from infancy to adulthood, depending on developmental stage and temperament. Children, particularly infants, require the most sleep during a 24-hour period. The natural sleep-wake cycle, governed by an internal "biological clock," tends toward a 25-hour day. It is affected by the relative balance of light and darkness in the environment. As darkness approaches, the hormone melatonin is secreted by the pineal gland and signals the brain that it is time to sleep.
NREM deep sleep
Sleep begins in stage one of the sleep phase known as NREM, or non-rapid eye movement, sleep. NREM sleep has four stages: light sleep, deeper sleep, and two stages of deepest sleep. Stage one is the "drifting off" period of light sleep in the transition between wakefulness and sleep and comprises about 5 percent of the entire sleep period. Stage two sleep involves a change in brain-wave patterns and increased resistance to arousal and accounts for 45–55 percent of total sleep time. Stages three and four are the deepest levels of sleep and occur only in the first third of the sleep period. NREM stage four sleep usually takes up 12 to 15 percent of total sleep time. Sleep terrors, sleepwalking, and bedwetting episodes generally occur within stage four sleep or during partial arousals from this sleep stage.
It typically takes about 90 minutes to cycle through the four deepening stages of NREM sleep before onset of the second phase of sleep known as REM or dream sleep.
REM dream sleep
Rapid eye movement (REM) sleep is qualitatively different from NREM sleep. REM sleep is characterized by extensive central nervous system (CNS) activity with an increase in brain metabolism accompanied by the vivid imagery of dreams. During REM sleep, the body is nearly paralyzed, a condition called "atonic," that serves to inhibit the dreamer from physical movement during active dreaming.
"Waking and dreaming are two states of consciousness, with differences that depend on chemistry," according to J. Allan Hobson, professor of psychiatry at Harvard Medical School. Physical activity and thought are suppressed in sleep, but the brain nonetheless remains active "processing information, consolidating and revising memory, and learning newly acquired skills." The brain self-activates, radically changing its chemical climate from wakefulness to sleep states.
REM sleep is also known as "paradoxical sleep" because muscle activity is suppressed even as the CNS registers intense brain activity and spontaneous rapid eye movements can be observed. Brain-wave monitoring of REM sleep with an electroencephalograph (EEG) reveals a low-voltage, fast-frequency, non-alpha wave record. Beyond infancy, REM sleep comprises 20–25 percent of the entire sleep period. This sleep phase is concerned with memory and the consolidation of new information.
Infancy
Newborn infants usually sleep for brief periods at a time around the clock, with the total of day and nighttime sleep roughly equal. A newborn's total sleep need is from 16 to 18 hours in every 24-hour period. Newborns spend approximately 50 percent of their sleep period in the REM phase. Infants are most easily awakened during this phase of sleep that is accompanied by yawning, squirming, and quiet vocalizations.
Infants move through REM and non-REM sleep stages in a 90-minute cycle, and they rise to a near-waking state every three to four hours, more often in breastfed infants. By about six months of age, babies usually will sleep through the night for 12 or more hours and will continue to nap several times throughout the day.
Resumen
Sleep Sounds - Calming melodie es un software de Freeware en la categoría de Audio y Multimedia desarrollado por Simplicity Provides.
La última versión de Sleep Sounds - Calming melodie es 1.65, aparecido en 29/08/2024. Inicialmente fue agregado a nuestra base de datos en 29/08/2024.
Sleep Sounds - Calming melodie se ejecuta en los siguientes sistemas operativos: Android.
Los usuarios de Sleep Sounds - Calming melodie le dio una calificación de 4 fuera de 5 estrellas.
Productos relacionados
Eight Sleep
The Eight Sleep app is designed to be used with the Eight Sleep Pod or Pod Pro Cover. It's important to note that not all features are available with every product.hypnu: Sleep hypnosis
Immerse yourself in a vast collection of over 3000 minutes of sleep and anxiety relief hypnosis sessions created by a team of 10+ professional hypnotists with Hypnu.Pzizz - Sleep, Nap, Focus
Pzizz is a sleep and relaxation app that aims to help users quiet their minds, fall asleep easily, stay asleep throughout the night, and wake up refreshed.Sleep Sounds - relaxing music
Are you struggling with falling asleep or battling insomnia? Look no further. Explore this complimentary sleep application that provides an array of calming sounds, such as nature sounds, rain sounds, meditation sounds, white noise, and …Sleeplus
The world's first portable smart stop device The Sleeplus App offers a professional and comprehensive solution for snoring. It provides detailed snoring data, sleep condition analysis, and multiple sleep aid scenarios.SleepSpace: Dr Snooze AI Coach
Upgrade your sleep with SleepSpace, the innovative app that goes beyond simple tracking. Developed based on proven Cognitive Behavioral Therapy principles, SleepSpace helps you fall asleep faster and stay asleep throughout the night.Slumber: Fall Asleep, Insomnia
Slumber Review Slumber is a comprehensive sleeping app aimed at relaxation and aiding with insomnia issues. This app offers a diverse selection of over 800 sleep-inducing stories, guided meditations, and calming night sounds to enhance …Últimas actualizaciones
Zotero 7.0.14
Zotero es una herramienta gratuita de gestión de referencias de código abierto desarrollada para ayudar a los investigadores y estudiantes a administrar sus citas y fuentes.PDF Logo Remover 1.6
PDF Logo Remover by SoftOrbits: An In-Depth Review PDF Logo Remover by SoftOrbits is a handy software application designed to remove unwanted logos, watermarks, stamps, and other images from PDF documents.PureVPN 13.6.0.5
PureVPN Review PureVPN, developed by GZ Systems Ltd., is a comprehensive VPN service that offers a wide range of features to ensure your online privacy and security.CalcTape 6.0.8.1
CalcTape by SFR Software GmbH: An Efficient Calculation Tool CalcTape, developed by SFR Software GmbH, is a powerful calculation software designed to simplify complex mathematical tasks for both personal and professional use.4k YouTube to MP3 5.7.5.171
4k YouTube to MP3 by 4kdownload.com 4k YouTube to MP3 by 4kdownload.com is a user-friendly software designed to help you easily convert YouTube videos into high-quality MP3 audio files.EditPad Lite 8.5.3
EditPad Lite es un editor de texto conveniente y cuidadosamente diseñado y un reemplazo Bloc de notas. Tiene todas las características que necesita un editor de texto sólido sin ningún hincha.Se pueden abrir tantos archivos a la vez como …Últimas noticias
Últimas reseñas
Recovery Toolbox for CD Free
Recuperación de CD sin esfuerzo con Recovery Toolbox for CD Free |
|
askSam
askSam: Tu Mejor Organizador de Información Personal |
|
Xilisoft 3GP Video Converter
Transforma tus videos con facilidad usando Xilisoft 3GP Video Converter |
|
PhotoMirage
Da vida a tus fotos con PhotoMirage de Corel Corporation. |
|
![]() |
VeryDOC PDF To Word Converter
Conversión de PDF a Word sin esfuerzo con VeryDOC |
HP LaserJet MFP M129-M134 Basic Device Software
Software eficiente y fiable para impresoras HP LaserJet |
![]() |
UpdateStar Premium Edition
¡Mantener su software actualizado nunca ha sido tan fácil con UpdateStar Premium Edition! |
![]() |
Microsoft Visual C++ 2015 Redistributable Package
¡Aumente el rendimiento de su sistema con el paquete redistribuible de Microsoft Visual C++ 2015! |
![]() |
Microsoft Edge
Un nuevo estándar en la navegación web |
![]() |
Google Chrome
Navegador web rápido y versátil |
![]() |
Microsoft Visual C++ 2010 Redistributable
Componente esencial para ejecutar aplicaciones de Visual C++ |
![]() |
Microsoft Update Health Tools
Herramientas de estado de Microsoft Update: ¡asegúrese de que su sistema esté siempre actualizado! |