Probably everyone has had at least once in his lifetime a heavy night of sleep in which he could not sleep.
A storm or a too late and very consistent dinner are simply two examples which can lead to sleep issues.
From a medical viewpoint, insomnia is the problem of falling asleep when it requires more than 45 minutes to fall asleep.
Insomnia is a sleep disorder that manifests by reducing the duration and depth. May result from painful abdominal disasters, neuralgia, hypertension, neurosis, psychosis, encephalitis, intoxication, diabetes, hyperthyroidism, emotional crisis etc..
– chronic insomnia: that lasts for several weeks, months or years;
– transient insomnia: it only lasts for many nights and is caused by an unpleasant event that produces dissatisfaction or frustration.
Complete persistent insomnia is characterized by a permanent fatigue; the patient almost can not fall asleep, and in the morning he’s in a state of melancholy. It can be prevented by following a reasonable work and rest regime and by administering painkillers or sleeping pills.
Sleep is indispensable to life, exactly like food and water. That’s why, in the last 25 years, scientists have given the phenomenon a particular focus, which has brought to the discovery of many interesting items.
We need sleep to grow, restore and work to optimum parameters. Memory and vigilance are contingent on the level of sleep, as well the ability to concentrate and learn, therefore, while sleeping our brain is re-energizing, cells are regenerate.
Also lack of sleep may cause an increase in weight by about 900 grams per week because we are disturbed by hormonal balance and we will feel the need to eat more frequently.
REM sleep in which we have dreams, happens in gust, about 90 minutes after falling asleep, usually summing up about 2 hours per night. Some scientists think that dreams help us to set memories in memory in the long term. Others, on the contrary, think that dreams help us eliminate some memories which are over that overlap and which otherwise would block brain activity.
REM sleep can play an important role in brain development. Premature babies sleep is 75 percent of the REM phase, this means 10% more than in the case of term infants.
Also, fatigue brought on by poor sleep causes 1 in 6 fatal road injuries.