We welcome you to our beautiful city! This is truly an exciting time for Worcester. Major investments in transportation improvements such as roadway network reconstruction projects and the provision of commuter rail service at the magnificently renovated Union Station are generating new economic activity.
Since the early 20th century, human sleep has been described as a succession of five recurring stages: four non-REM stages and the REM stage. (A sixth stageârelaxed wakefulness, the phase during which a person falls asleepâis sometimes included).
The Sequence of Sleep Stages. It is important to realize that sleep does not progress through these stages in sequence. Sleep begins in stage 1 and progresses into stages 2, and 3. After stage 3 sleep, stage 2 sleep is repeated before entering REM sleep. Once REM sleep is over, the body usually returns to stage 2 sleep. Sleep cycles through these stages approximately four or five times throughout the night. On average, we enter the REM stage approximately 90 minutes after falling asleep.