Сон,стадии сна

ТОПИК 1.

Мысли и чувства.

Thanks to thinking we can be used to prove any point of view. The very first step in teaching thinking must be to provide a by pass to this instant judgment be requiring the relevant and interesting points in the situation.

Feeling are a sort of action. The feeling may still be wrong, misplaced or exaggerated, but is a much lesser danger than trying to abolish feeling. We trust our feelings because we cannot see how they can be wrong. Even more difficult for us to accept that our perception may be limited.

ТОПИК 2.

Dreams

The fact that it is more difficult to awaken a person from REM than from NREM sleep provides some initial support for Freud’s idea that dreams protect sleep. If subjects are awakened every time there is an onset of REM, they have a night’s sleep without dreams. Such deprivation there was more REM sleep the following night, indicating that there is a kind of «quota» for REM; and when there is less REM sleep one night, more will be required the next. Indirectly, this would support the Freudian theory of dreams as a protector of sleep. In the first place, REM is prominent in infants, when meaningful dreams are unlikely to occur, and also in lower mammals. The study of the dreams of older children shows that their dreams reflect the realistic activities.

But from the work done so far, it appears that dreaming serves several cognitive functions; it is measurably involved in mood changes; it seems to provide the energy space for working out problems set aside through days filled with busy activity; and, in general, it offers a kind of workshop for the repair of self-esteem and competence.

ТОПИК 3.

Сон,стадии сна.

Every day every human being experiences two kinds of sleep that alternate rhythmically throughout the entire sleep period.

Dr. Kleitman coined the term «REM» to define the phenomenon. The other kind eventually acquired the name «NREM» sleep. The «NREM» state is often called «quiet sleep», because of the slow, regular breathing, the general absence of body movement. The body is not paralyzed during NREM sleep. The first sleep of the night is always NREM sleep, which must progress though its various stages before the first REM period occurs. REM sleep is an entirely different state of existence. At the onset of REM sleep the sleeper’s body is still immobile, but we can see small. Convulsive twitches of his face and fingertips.

The NREM-REM cycle varies from 70 to 110 minutes, but averages around 90 min. in the early part of the night sleep is dominated by the NREM state, but as the night progresses, the periods of quiet sleep become shorter and the REM episodes longer. The first REM period lasts 10 min., but by early morning they can last as long as an hour. So we are believed to go into REM sleep and dream roughly every 90 min. all night long. So most of us sleep in two distinct ways: REM sleep, when we dream, and «quiet» sleep when we simply sleep.

ТОПИК 4.

Поиск по сайту: