Sleep Is A Periods Of Reduced Activity

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Introduction: We spend about eight hours of the day asleep and spend almost one third of our time on earth asleep! So exactly what is sleep? Sleep is a period of reduced activity. During sleep the body changes internally and externally. It rejuvenates and restores the body, and it follows a predictable pattern consisting of infiltrating Non-REM and REM sleep. Review of Research: Sleep is usually a time where the body is at a lying down position with the eyes shut. The outcome of sleeping is when the body’s receptivity to external stimuli is diminished (The Characteristics of Sleep, n.d.). Generally people define sleep as an inactive part of our daily lives but, we now know that the brain remains active during sleep (What is Sleep?, n.d.). Sleep consists of two main stages of sleep; Non-REM (NREM) and REM (Rapid Eye Movement) sleep. Non-REM sleep consists of three stages each stage that you infiltrate is deeper. N1 or the transition to sleep, lasts from five minutes up to ten minutes and without difficulty you are awakened (e.g., Smith, Robinson, & Segal, n.d.). Jerky movements or muscle twitches occur during this stage as well. During stage N2, you are already in light sleep. This stage generally lasts from ten to twenty-five minutes. All the while, heart rate and body temperatures decrease, and eye movement stops. Lastly, at stage N3 it is very hard to be roused and blood flow is not heading to your brain but, towards the muscles of the body (e.g., Smith et al., n.d.).
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