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Finding the right sleep sound is a bit like finding the right type of pajamas, says Dr. Winter. And while research on the sleep benefits of different noise types is limited, it’s definitely growing.
Hypnos (left) and Thanatos (right) carry the body of Sarpedon while Hermes watches, Euphronios Krater, an Attic red-figure calyx-krater, c. 515–510 BC [1]. In Greek mythology, Hypnos (/ ˈ h ɪ p n ɒ s /; Ancient Greek: Ὕπνος, 'sleep'), [2] also spelled Hypnus, is the personification of sleep.
Slow-wave sleep (SWS), often referred to as deep sleep, is the third stage of non-rapid eye movement sleep (NREM), where electroencephalography activity is characterised by slow delta waves. [ 2 ] Slow-wave sleep usually lasts between 70 and 90 minutes, taking place during the first hours of the night. [ 3 ]
Vanderwolf made a strong argument that the presence of theta in the hippocampal EEG can be predicted on the basis of what an animal is doing, rather than why the animal is doing it. Active movements such as running, jumping, bar-pressing, or exploratory sniffing are reliably associated with theta; inactive states such as eating or grooming are ...
Two new studies suggest once again the importance of getting a good night's sleep for good health over a lifetime, as scientists pursue new understandings of restorative deep sleep.
Hypnogram showing sleep architecture from midnight to 6:30 am, with deep sleep early on. There is more REM (marked red) before waking. (Current hypnograms reflect the recent decision to combine NREM stages 3 and 4 into a single stage 3.) Understanding the activity of different parts of the brain during sleep can give a clue to the functions of ...