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The cognitive shuffle is based on Beaudoin’s somnolent information processing theory. [5] [13] The somnolent information processing theory postulates the existence of a sleep onset control system that evolved to ensure that falling asleep tends to happen when it is evolutionarily opportune (safe, timely) to fall asleep. [14]
The word hypnagogia is sometimes used in a restricted sense to refer to the onset of sleep, and contrasted with hypnopompia, Frederic Myers's term for waking up. [2] However, hypnagogia is also regularly employed in a more general sense that covers both falling asleep and waking up.
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.
Initial or "sleep-onset" insomnia consists of having difficulty falling asleep at the beginning of sleep. The disrupted sleep patterns caused by middle-of-the-night insomnia make many sufferers of the condition complain of fatigue the following day.
[1] [11] They may have difficulty falling asleep, or staying asleep for as long as desired. [1] [9] [12] Insomnia is typically followed by daytime sleepiness, low energy, irritability, and a depressed mood. [1] It may result in an increased risk of accidents of all kinds as well as problems focusing and learning. [9]
A teenager on a field trip to see a Detroit court ended up in jail clothes and handcuffs because a judge said he didn't like her attitude. Judge Kenneth King even asked other kids in the courtroom ...
People with DSPD fall asleep at more or less the same time every night, and sleep comes quite rapidly if the person goes to bed near the time they usually fall asleep. Young children with DSPD resist going to bed before they are sleepy, but the bedtime struggles disappear if they are allowed to stay up until the time they usually fall asleep.
It has distinct meanings and causes. It can refer to the usual state preceding falling asleep, [1] the condition of being in a drowsy state due to circadian rhythm disorders, or a symptom of other health problems. It can be accompanied by lethargy, weakness and lack of mental agility. [2]