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Nature sounds like birdsong or rainfall can provoke a feeling of peacefulness and tranquillity to facilitate sleep. [28] Binaural beats work by presenting two different frequencies to each ear that synchronize brainwave activity.
Hours of sleep recommended for each age group [93] Age and condition Sleep needs Newborns (0–3 months) 14 to 17 hours Infants (4–11 months) 12 to 15 hours Toddlers (1–2 years) 11 to 14 hours Preschoolers (3–4 years) 10 to 13 hours School-age children (5–12 years) 9 to 11 hours Teenagers (13–17 years) 8 to 10 hours
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Ambient music is a genre of music that emphasizes tone and atmosphere over traditional musical structure or rhythm.Often "peaceful" sounding and lacking composition, beat, and/or structured melody, [5] ambient music uses textural layers of sound that can reward both passive and active listening, [6] and encourage a sense of calm or contemplation.
The Science of Sleep is the soundtrack album to the Michel Gondry film of the same name. The score was composed by Jean-Michel Bernard. The album features the song "If You Rescue Me", originally "After Hours" by The Velvet Underground. The song "Instinct Blues" by the White Stripes is featured in the film but is not on the soundtrack album.
Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...
Occasional noncircadian days may occur (i.e., sleep is "skipped" for an entire day and night plus some portion of the following day), followed by a sleep period lasting 12 to 18 hours. The symptoms do not meet the criteria for any other sleep disorder causing inability to initiate sleep or excessive sleepiness.
In cats, the sleep cycle lasts about 30 minutes, though it is about 12 minutes in rats and up to 120 minutes in elephants (In this regard, the ontogeny of the sleep cycle appears proportionate with metabolic processes, which vary in proportion with organism size. However, shorter sleep cycles detected in some elephants complicate this theory).
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