Sedating antihistamines wiki
General signs are, the body temperature begins to drop, muscles become relaxed, and the eyes often move slowly from side to side, and lose awareness of their surroundings, but they are easily jarred into wakefulness.
Stage 2: This is the first stage of established sleep, and the very first time it occurs it lasts ten to twenty five minutes before you progress to another stage of sleep.
This cluster of cells is part of the Hypothalamus, the brain center that regulates appetite and other biological states.
In the past 30 years, however, laboratory studies on human volunteers have yielded new information about the different types of sleep.
Scientist divide sleep into two major types: figure A – different stages of sleep: Stage 1: Also called Alpha brainwave pattern sleep.
Once your eyes are closed your nerve cells no longer receive visual input.
On the EEG tracings, the resulting waves become bigger, and more distinct and eventually, the large slow brain wave called Delta waves become the major features on the EEG.
The melatonin production can be suppressed even in the middle of the night by exposure to light.
Lack of sleep is directly linked to poor health, and it increases the risk of diabetes, heart diseases, obesity, and personality disorders. In the 1970s, the location of this internal clock was found to be the Supra Chiasmatic Nucleus(.
Sleep deprivation played a role in catastrophes such as the Exxon Valdez oil spill off the coast of Alaska, the space shuttle Challenger disaster, and the nuclear accident at the Three Mile Island. National Library of Medicine and National Institutes of Health indicate that there are more than 100 different types of sleep and waking disorders, it is a group of syndromes characterized by disturbance in a person’s hours of sleep, their quality or timing of sleep, or in behaviors or physiological conditions associated with sleep. Marc Halpern defines it as “Sleep disorders are conditions in which a person’s sleep pattern is disturbed, such that a person has a hard time falling asleep, staying asleep, sleeps too much, or sleeps at inappropriate times” . Although it is largely self-regulating, the clock responses to several types of external clues to keep it set twenty-four hours, and scientists call these cues Zeitgebers – a German word meaning “time givers” – it includes, Light, Time Cues, and Melatonin.
Researchers have learned about the cyclical patterns of different types of sleep and their relationships to breathing, heart rate, brain waves, and other physical functions.
These measurements are obtained by a technique called Polysomnography, and the use of Electroencephalogram(EEG) recording which capture a recording of electrical activity in the brain. The more active the brain, the more small, fast, chaotic looking wave pattern, the less active the brain, shows a larger, slower, and more regular wave pattern.