Sleep structure follows a periodic pattern of NREM and REM sleep phases lasting about 90 minutes each throughout a typical night's sleep. Read more at sleepfoundation.org. Deep sleep is essential for physical restoration, memory consolidation, and brain health. REM sleep, characterized by vivid dreams and increased brain activity, is crucial for cognitive function and emotional regulation.
Remember that individual sleep requirements may vary depending on factors such as age, activity level, and health status.