Uneperioodi

Uneperioodi refers to a phase or segment of sleep. In the study of sleep, it is understood that sleep is not a monolithic state but rather a cyclical process. These cycles are characterized by distinct stages, and each cycle consists of several uneperioodi. The primary division within sleep is between non-rapid eye movement (NREM) sleep and rapid eye movement (REM) sleep. NREM sleep is further subdivided into lighter stages and deeper stages.

During a typical night, an individual will cycle through these different uneperioodi multiple times. Each cycle usually lasts around 90 to 120 minutes. The progression through these periods is generally consistent, though variations can occur due to factors like age, sleep disorders, and external influences. The specific characteristics of each uneperioodi, such as brain wave activity, muscle tone, and eye movements, differ significantly, contributing to the overall restorative functions of sleep. Understanding these phases is crucial for diagnosing and treating sleep disturbances and for comprehending the complex architecture of human sleep.