A night of sound sleep is not an easy concept, and the words “awake” and “sleeping” cannot fully reflect the complexity of all levels of consciousness through which a person passes overnight. Sleep can be divided into three stages, each of which has its own essential differences.
Stage 1 – the first stage of sleep, characterized by the transition of the brain from alpha waves to the beginning of theta waves. Thoughts may start to get confused. This stage differs from others in that during it a person practically remains in consciousness. Such a “dream” is so superficial that during the experiments performed, patients often stated that they did not sleep at all. Healthy people usually stay in this state for only a few minutes, but a person suffering from insomnia can spend most of the night in such a half-sleep.
Deep, or “slow,” sleep is the deepest sleep during which dreams are absent. On the other hand, there is a knowledge of delta sleep, which is characterized by brain delta waves. It is deep sleep that has the best regenerating effect, and its lack can lead to emotional and physical exhaustion. If you actively dreamed at night, but you got up with a feeling of fatigue and tension, then perhaps you didn’t have enough delta sleep.
Rapid sleep is a stage in which dreams occur. For REM sleep is characterized by a circular eye movement, as in wakefulness. This stage is crucial for mental and emotional recovery.
Together, these stages constitute a complete sleep cycle. A healthy person goes through several complete cycles overnight. It is known that all three stages are necessary for a full night’s rest and recovery of the body. The sleeping pill disrupts the sleep stage, so the person who has taken it wakes up tired anyway, as if he had not slept at all.