Sleep cycle
The sleep cycle, also known as the sleep-wake cycle, is a complex and highly regulated process that occurs in the body, influenced by factors such as Circadian rhythms, Melatonin levels, and Sleep disorders. A typical sleep cycle lasts around 90-120 minutes and consists of three stages of Non-rapid eye movement sleep (NREM) and one stage of Rapid eye movement sleep (REM). During NREM sleep, the body repairs and regenerates tissues, builds bone and muscle, and strengthens the immune system, while REM sleep is characterized by high brain activity, vivid dreams, and memory consolidation. The sleep cycle is controlled by the Brain's internal clock, which responds to light and darkness to synchronize the body's physiological processes with the 24-hour day-night cycle, also known as the Diurnal cycle. Understanding the sleep cycle is essential for maintaining good Sleep hygiene and overall health.