Consciousness is what we are aware of the feelings, thoughts, sensations and environments but the consciousness get alter when we sleep, take medicines, hypnosis and take drugs. Now, it comes as why we need to sleep? The simple answer is that body and mind both need to restore. There are two kinds of sleep such as non-rapid eye movement and rapid eye movement. It has been found from the research that each cycle of sleep is about 5-90 minutes. For the different age group of humans the sleep time is different as newborn child sleep almost for 20 hours and older people sleep for less than 6 hours. Even though it is know that prolonged wakefulness effects human body badly. As by the research by Patrick and Gilbert in year 1986 that the wakefulness for 90 hours continuously causes in decrease in sensory acuity, motor speed, ability to memorise, and production of visual hallucinations. This happens because of the not having the proper sleep and that is called as sleep deprivation. It mi...
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