Final answer:
Adults typically spend 75-80% of their sleep time in non-REM (NREM) sleep. This can be influenced by factors such as circadian rhythms, light exposure, age, and sleeping patterns. NREM and REM sleep have important roles in learning and memory, impacting an individual's emphasis on sleep quality.
Step-by-step explanation:
Typically, adults spend approximately 75-80% of their sleep time in non-REM (NREM) sleep each night. The exact amount can vary depending on several factors including age, lifestyle, and individual sleep needs. As we age, the pattern of sleep often shifts, with older adults spending a smaller proportion of time in the deep stages of NREM sleep. Factors that contribute to changes in NREM sleep include circadian rhythms, exposure to light, shift work, travel across time zones, and sleep habits. For instance, prolonged exposure to artificial light and irregular sleep schedules can disrupt our biological clock leading to alterations in our sleep architecture.
Moreover, as the need for sleep decreases with age, older adults might spend less time in NREM sleep. The presence of sleep disorders, stress, and underlying health conditions can also influence the amount and quality of NREM sleep. Understanding that NREM and REM sleep are essential for learning and memory can encourage individuals to prioritize sleep for their overall well-being and cognitive functioning.