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 five stages of sleep, including their repetition, occur cyclically. The first cycle, which ends after the completion of the first REM stage, usually lasts for 100 minutes. Each subsequent cycle lasts longer, as its respective REM stage extends. So a person may complete five cycles in a typical night's sleep.