Sleep is a good indicator of the health of a person and relate to the context in which it lives.
Sleep is an important stage of the day in our lives. When you’re tired, you yawn, you blink. We are looking for quiet and dark. We sleep about one third of our lives.
1. Physiology of sleep
A night’s sleep includes regular alternation of two states. There are first-REM sleep, where you can observe the body’s sleep and a slowing of vegetative functions. This state allows the recovery of physical strength. It lasts longer in the early night.
Then there is REM sleep. It is so called because it combines signs of deep sleep signs of awakening. It allows the recovery of nervous fatigue. At this stage here that dream.
2. How long is a cycle?
Each of these steps is a cycle that lasts, according to individuals, 90 to 120 minutes. The cycle is repeated three, four or five times during the night. At the end of each cycle, the individual decides whether to wake up permanently.
3. Sleep disorders
Many people are not satisfied with the quantity or quality of their sleep. They suffer, for the most of what is known in sleep disorders medicine. Several sleep disorders are considered illnesses:
snoring (in some cases); insomnia;
the sleep apnea syndrome, which affects more women primarily;
narcolepsy, a disease causing involuntary sleepiness and excessive sleepiness; somnambulism.
Various treatments exist for treating these diseases. There are even sleep centers.
4. The need for sleep
The need for sleep varies among individuals, ages and climates. In fact, a newborn sleeps almost 20 hours a day. A child of one year about 12 hours sleep per night, plus 2 or 3 hour nap in the day. A child aged 4 sleeps approximately 10-12 hours a night.
In an adolescent sleep time reached 10 hours a night or more, while an adult will need 6 30 am to 8 hours of sleep. Must follow our biological clock.
The elderly, meanwhile, much less sleep (5-6 hours), and differently. The time of sunset and sunrise are tots. They have a lighter sleep and take longer to fall asleep. The awakenings are more numerous and their sleep is fragmented.
We can therefore conclude that sleep needs are different people, and it will also take into account their life context (country, climate, age and even, sometimes, family history). Also read this review about simple treatment, which can help you Stop Snoring.