Rest is crucial for our body’s ability to function properly. The amount of sleep a human body needs is contingent on both physical shape and sleeping conditions. During sleep, the body regenerates nerve energy, by conducting low-level electricity. Neurons travel through the body every second of every day, but parts of the brain – the ones that determine consciousness – need to be shut down periodically in order to prevent body fatigue.
All mammals require sleep, and yet we have yet to discover exactly why. The most obvious theory involves energy – recharging drained areas, lowering blood pressure and heart rate, etc. A more psychological theory makes sense as well – mammals have brains, therefore they need time to correct errors and process new information, as well as exercise deteriorating areas. Lots of times a brain will work like a computer without any energy limits, and much like a computer every neurological process is a physical/chemical act that needs time to complete.
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