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“There are many people who think everyone needs eight to eight and a half hours of sleep per night and there will be health consequences if they don’t get it,” Dr. Louis Ptacek, a neurology ...
Hori et al. regard sleep onset hypnagogia as a state distinct from both wakefulness and sleep with unique electrophysiological, behavioral and subjective characteristics, [10] [12] while Germaine et al. have demonstrated a resemblance between the EEG power spectra of spontaneously occurring hypnagogic images, on the one hand, and those of both ...
The whole period normally proceeds in the order: N1 → N2 → N3 → N2 → REM. REM sleep occurs as a person returns to stage 2 or 1 from a deep sleep. [20] There is a greater amount of deep sleep (stage N3) earlier in the night, while the proportion of REM sleep increases in the two cycles just before natural awakening. [17]
A false awakening may occur following a dream or following a lucid dream (one in which the dreamer has been aware of dreaming). Particularly, if the false awakening follows a lucid dream, the false awakening may turn into a "pre-lucid dream", [2] that is, one in which the dreamer may start to wonder if they are really awake and may or may not come to the correct conclusion.
The National Sleep Foundation says that stress, depression, daytime drowsiness, alcohol, and fever can also cause somniloquy. Experts advise sleep talkers to reduce their anxiety and develop ...
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.
The cognitive shuffle is a cognitive strategy in which one thinks about a neutral or pleasant target for a short period of time (normally every 5–15 seconds) and then switches to thinking about an unrelated target. [7] Serial diverse imagining (SDI) is a type of cognitive shuffling in which people switch between imagining various concrete ...
For example, a person may pick up a glass of water with their right hand and put it up to their lips for a drink. The person may have picked up the glass with their right hand, but well before this action takes place, the PMC and SMA consider a variety of different possibilities of how this action could be performed.