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).
Sleep architecture follows a pattern of alternating REM (rapid eye movement) and NREM (non-rapid eye movement) sleep throughout a typical night in a cycle that repeats itself about every 90 minutes. NREM (75% of night): As we begin to fall asleep, we enter NREM sleep, which is composed of stages 1-4.