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Traffic noise can decrease cognitive abilities.



Sleeping problems are opening the road for finding out why people see dreams. So many researchers highlight the REM periods of sleep. But also the other periods of sleep have a purpose. Deep sleep periods are the most mysterious things in sleep. 

Most of the sleep is deep sleep or delta-sleep. And things that happened during those periods are a mystery. And there is the possibility that a person sees dreams during those periods. But the REM period just before awakening wipes those things out of the memory. 

But the fact is that REM (Rapid Eye Movements)  sleep is only a short period of sleep. And also, deep sleep periods are important things for the quality of sleep. The thing is that deep sleep period are important so that brains can rest. 

During those periods brains are loading their neurotransmitters. So maybe the other purpose of the REM period is to test the neural tracks for the next day. And maybe another reason for the REM period is that it's the indicator that brains realize the level of sleep. 

Some researchers believe that the purpose of the REM period is to wipe out things that a person saw during deep sleep periods. But there might be many purposes for REM sleep. And one of them might be to prepare the person for the next day. 

Even low-level traffic noise can decrease cognitive abilities. The fact is that the traffic noise will keep the person awake.  And it can decrease the level of sleep. And that causes the quality of sleep decreases. The increasing level of the REM periods is causing a situation where some neurotransmitters get lower and that causes that in the morning person will be tired. Good and effective sleep also requires so-called deep sleep periods because brains are loading their neurotransmitters during deep-sleep periods. 

The brains will load neurotransmitters during those periods. And the purpose of REM sleep could be to test the neural tracks. Maybe one of the purposes of REM sleep is to prepare people for the next day. There are also some psychological purposes for that thing that we call sleep. In some models during sleep person will analyze the things that are too hard to handle when a person is awake. 

But the REM sleep along with its dreams is a so-called light dream. The purpose of a light dream is when something is felt threatening.  If a person is in the REM period, the person can wake up very fast. So maybe the purpose of REM sleep is to act as a mark that the level of sleep is at a certain level, where fast waking and acts just after that is possible. 

The traffic noise would make brains feel that person is under some kind of threat. And that keeps the sleeper almost awake. The traffic noise can mean that the car is driving over that sleeper. Especially when traffic noise suddenly starts after midnight brains have problems getting back to sleep. 

When a person sleeps, the brain cannot make difference between real- and hypothetical threats. There are no virtual threats in nature. So traffic noise is more harmful to sleep quality than it should. And even low noise traffic can cause the quality of sleep decreases. That thing causes problems with cognitive actions. 

When a person is tired that thing affects the ability to concentrate and think. The traffic noise is the mark of hypothetical threats as I wrote earlier. And the problem with human brains is that they are created to make a person survive in dark forests where all threats are real. That's why human brains are taking all things seriously. 


https://scitechdaily.com/bad-things-happen-after-dark-scientists-call-for-new-research-on-how-our-brains-change-when-were-awake-after-midnight/


https://scitechdaily.com/traffic-noise-can-slow-cognitive-development/


Image: https://scitechdaily.com/traffic-noise-can-slow-cognitive-development/




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