Ruhezyklus

The Ruhezyklus, also known as the sleep cycle, is a natural pattern of sleep and wakefulness that occurs approximately every 90-110 minutes. It is composed of several stages, each with distinct characteristics and functions. The first stage, known as Stage 1, is a transition from wakefulness to sleep, characterized by a slowing of brain activity and the appearance of theta waves. Stage 2 is a deeper sleep stage, marked by the presence of sleep spindles and K-complexes, which are brief bursts of brain activity. Stage 3, also known as slow-wave sleep (SWS), is the deepest stage of sleep, characterized by the presence of delta waves, which are slow, high-amplitude brain waves. Stage 4 is a deeper stage of SWS, with even more delta waves. The final stage, known as REM (rapid eye movement) sleep, is characterized by rapid eye movements, increased brain activity, and vivid dreaming. The Ruhezyklus is essential for physical and mental health, as it allows the body to repair and regenerate, and the mind to consolidate memories and process emotions. Disruptions to the Ruhezyklus, such as those caused by sleep disorders or shift work, can have significant negative effects on health and well-being.