When it comes to understanding our sleep patterns, there are many misconceptions about what exactly happens during each stage of sleep. One common question people have is the difference between REM, core, and deep sleep. In this article, we'll break down what each stage entails and how they work together to help us get a good night's rest.

REM Sleep

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Brain waves are less active during REM (rapid eye movement) sleep, and heart rate, blood pressure, and breathing slow down. This stage is characterized by vivid dreams and rapid eye movements. The muscles remain still, but the brain is active and processing information.

Core Sleep

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Core sleep refers to the deeper stages of non-rapid eye movement (NREM) sleep, which include N2 and N3. During these stages, the body's physiological processes slow down even further, including a decrease in heart rate, blood pressure, and breathing. The brain waves also become slower and more synchronized.

Deep Sleep

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Deep sleep, also known as slow-wave sleep (SWS), is the deepest stage of NREM sleep. During this stage, the brain waves slow down to their lowest frequency, and it becomes difficult to wake up. This stage is crucial for physical restoration and rejuvenation.

The 90-Minute Cycle

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A typical sleep cycle consists of three stages of NREM sleep (N1, N2, and N3) followed by one stage of REM sleep. Each cycle lasts approximately 90 minutes, and most people experience four to six cycles per night. The full process of all four cycles takes around 7-8 hours to complete.

Sleep Architecture

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The organized and structured process of normal sleep is known as sleep architecture. This refers to the sequence of stages and how they work together to help us get a good night's rest. Each stage has its own unique characteristics, but they all play a crucial role in maintaining our physical and mental health.

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In conclusion, REM, core, and deep sleep are three distinct stages that make up the complex process of sleep. Understanding these stages can help us appreciate just how important sleep is for our overall health and well-being. By recognizing the importance of each stage, we can take steps to improve the quality of our sleep and wake up feeling refreshed and rejuvenated.

Remember, if you're experiencing any issues with your sleep or have concerns about your sleep patterns, it's essential to consult with a healthcare professional for personalized advice and guidance.

Rem vs core vs deep sleep