Ace the 2026 Registered Sleep Technologist Exam – Sleep Your Way to Success!

Stage N1 sleep, also known as non-REM stage 1, typically comprises about 5-10% of the total sleep period in a healthy adult. This stage is characterized by light sleep, during which the transition from wakefulness to sleep occurs. It is relatively short compared to other sleep stages and involves a decrease in heart rate and relaxation of muscles, making it easy to wake a person during this stage.

Understanding the distribution of sleep stages is critical for interpreting polysomnography results and diagnosing sleep disorders, as each stage serves a distinct function in the overall sleep architecture. Stage N1 usually leads to deeper sleep stages (N2, N3) as the night progresses, emphasizing its role as a transitional phase in sleep cycles.