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Sleep-learning or sleep-teaching (also known as hypnopædia or hypnopedia) is an attempt to convey information to a sleeping person, typically by playing a sound recording to them while they sleep. Although sleep is considered an important period for memory consolidation , [ 1 ] scientific research has concluded that sleep-learning is not possible.
The development of concepts, beliefs and practices related to hypnosis and hypnotherapy have been documented since prehistoric to modern times.. Although often viewed as one continuous history, the term hypnosis was coined in the 1880s in France, some twenty years after the death of James Braid, who had adopted the term hypnotism in 1841.
During pre-industrial Europe, biphasic (bimodal) sleeping was considered the norm. Sleep onset was determined not by a set bedtime, but by whether there were things to do. [143] The boundaries between sleeping and waking are blurred in these societies.
The same tale was told in the earlier 12th century work “Disciplina Clericalis,” and even became part of the 17th century book “Don Quixote” — only in this version Quixote’s squire ...
One of the important questions in sleep research is clearly defining the sleep state. This problem arises because sleep was traditionally defined as a state of consciousness and not as a physiological state, [14] [15] thus there was no clear definition of what minimum set of events constitute sleep and distinguish it from other states of partial or no consciousness.
During a normal night of sleep, a person will alternate between periods of NREM and REM sleep. Each cycle is approximately 90 minutes long, containing a 20-30 minute bout of REM sleep. [7] NREM sleep consists of sleep stages 1–4, and is where movement can be observed. A person can still move their body when they are in NREM sleep.
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Sleep diary layout example. Sleep medicine is a medical specialty or subspecialty devoted to the diagnosis and therapy of sleep disturbances and disorders. [1] From the middle of the 20th century, research has provided increasing knowledge of, and answered many questions about, sleep–wake functioning. [2]