What Sleep Is All About

Several theories have surfaced explaining the many different reasons why we sleep. However, up to this point in time, the exact reason why we do it remains an elusive truth. Nevertheless, the importance of sleeping can neither be denied nor dismissed. Sleep is so important to each one of us that it warrants no surprise why sleeping aides have gained a considerable following in the market.
Before, scientists perceived that our brains' normal state is that of wakefulness, and sleep signifies a halting of our brains' activities. But persistent research combined with modern technology has confirmed that our brain does not become inactive in either stage. Moreover, it is continuously working albeit the use of diverse parts for each state.
Entering into Sleep Mode
The neurotransmitters located in our brains are chemicals that alert our nerves, determining if we are asleep or not by acting on various nerve groups, neurons, and cells—all of which are found also in our brains. The serotonin and noropinephrine transmitters are responsible for maintaining certain portions of our brain during the state of wakefulness. The aforementioned are produced by neurons found in our brainstems, which links our spinal cords to our brains. Certain neurons located at the base of our brains start to send signals once we fall asleep. In doing so, they turn off the signals that maintain our wakefulness. In addition, research has divulged that the presence of adenosine is what causes us to become sleepy. They accumulate in our blood as we are awake, and eventually, they would induce sleepiness.

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