While sleeping, it was really brainwashed.
This Time, scientists at Boston University, in an unprecedented move, filmed the cleansing process.
Red is blood, blue is cerebrospinal fluid. The great thing is not found before, the blood will periodically flow out of the brain in large quantities. Every time the blood flows out in large quantities, the cerebrospinal fluid takes the opportunity to launch a wave of attack.
The cerebrospinal fluid enters and removes toxins, such as beta amyloid, which causes Alzheimer’s disease.
Such cleansing, however, can only be done after falling asleep, allowing a person to wake up with a refreshed brain; when not asleep, cerebrospinal fluid does not have ample opportunity to take advantage of the situation.
In addition, the researchers also found a relationship between brain electrical activity and the cleaning process, which means that brain waves direct the movement of fluid.
This result, which just made it to Science.
The authors are excited: one step closer to revealing the link between Alzheimer’s disease and sleep.
And Maiken Nedergaard, a neuroscientist at the University of Rochester, can’t help but exclaim.
This is a great paper.
It’s totally unexpected that someone could actually prove that brain electrical activity is capable of getting the fluid flowing.
So get some more sleep and don’t stay up late. If you don’t finish brainwashing, you may really become stupid.
Why is brainwashing only possible if you fall asleep?
When you fall asleep, the brain goes through several different stages.
After a period of falling asleep, a period of light sleep, then a period of mature sleep and a period of deep sleep, we will enter a period of rapid eye movement (REM) sleep, which is a state prone to dreaming.
Scientists call the first four stages together “non-REM”. This new study is focused on the non-REM stage, which is a very important stage for the brain to retain memory (Memory Retention).
In fact, it has been shown in 2013 that toxins like beta amyloid are cleared from the brain during sleep in mice. The cleanser that the brain uses is called cerebrospinal fluid.
The question is, how exactly is it cleared? Why is it only cleared when you sleep?
Scientists did an experiment where they put 13 humans in an EEG cap and put them to sleep in a magnetic resonance imaging (MRI) machine. The EEG would show which sleep state a person was in; and the MRI would measure blood oxygen levels and show how much cerebrospinal fluid was flowing in and out.
Then the wonderful phenomenon was discovered.
The blood oxygen concentration in the brain showed a significant large cyclical change. That is, blood flows massively and periodically out of the brain.
At this time, the cerebrospinal fluid takes the opportunity to rush into the brain and fill up all the space left for it: the
Green is the blood oxygenation signal, purple is the cerebrospinal fluid signal
After waking up, the large cycle is gone and the cerebrospinal fluid is not able to rush into the brain in large quantities to complete the effective cleansing of.
Laura Lewis (“Lewis”), the paper’s corresponding author, believes that this is because neurons in the brain begin to synchronize their activity during sleep, turning them on and off together.
The reason for this speculation is that the EEG data show that the flow of blood and cerebrospinal fluid occurs after a neural rhythm is present.
When a large number of neurons stopped exciting together, there was less need for so much blood to go in and deliver oxygen, which gave the cerebrospinal fluid the opportunity to flood in.
This leads to the scene we saw at the beginning.
This finding is important in that it tells us that sleep is a very specific function: the
When we are awake, the neurons do not turn on and off at the same time. So, there is no way to get the blood volume in the brain to drop to a low enough level when you are awake.
Only after falling asleep, when there is not so much blood in the brain, the cerebrospinal fluid can circulate freely to remove metabolic by-products like beta amyloid.
So, if you stay up late often, the brain will not be cleaned, and then you will really slowly “stupid”.
Don’t stay up late anymore.
What can I eat to make up for my health if I stay up late?
Staying up late one really should be responsible for their own health and beauty, try to adjust the work and rest time, to ensure that the best sleep before 11:00 each night, as well as 7-8 hours of sleep.
However, in real Life, there are always irresistible factors and stay up late, such as the inevitable fun during the New Year, such as the need to work. If you can’t avoid it, what can we eat to reduce the damage to the body and make up for the health of the body by staying up late?
01 Protein
Protein can repair the liver. For people whose liver function is damaged as well as weakened after staying up late, eating more high-protein Food appropriately is more conducive to liver recovery, while preventing further damage to the liver, and can also replenish energy for you who are tired after staying up late.
Foods like eggs, tofu and other such high-protein, low-calorie foods are good for repairing liver cells and promoting liver cell regeneration.
After staying up all night, you can drink a glass of milk before going to bed or when you wake up to repair the loss of staying up in time.
02 Vitamin A
Staying up late can cause eye fatigue, and vitamin A can relieve visual fatigue caused by excessive eye use, regulate retinal photoreceptors, help improve the adaptability to dim light, and prevent eye fatigue and vision loss.
The daily intake of vitamin A is 800 micrograms for men and 700 micrograms for women.
One carrot is sufficient for one day’s intake. In addition to carrots and animal liver, spinach, broccoli, etc. also contain a lot of vitamin A.
03 B vitamins
B vitamins speed up the body’s metabolism, help eliminate toxins, maintain healthy skin and slow down skin aging.
Vitamin B12 can maintain the normal functioning of the nervous system, improve memory loss, lack of concentration and other problems that can occur after a late night.
Often sleep too late, you can supplement B vitamins by eating some soybeans, rice, mushrooms.
04 Vitamin C
Adrenaline secretion will increase when staying up late, and the synthesis of adrenaline needs vitamin C. The next day after staying up late, there will be weakness and fatigue, then supplement vitamin C, which has the effect of relieving fatigue and calming down.
In addition, vitamin C has the effect of reducing melanin deposition, which can alleviate the dark circles under the eyes that appear after staying up late.
If you are too tired and somewhat uncomfortable after staying up late, eat some kiwi, cherries, oranges and other fruits rich in vitamin C.
In addition, pay attention to your diet when staying up late
Avoid foods with high fat content such as instant noodles, shortening bread and meat products. Because they are slow to digest, it will slow down the stomach emptying time and may even affect the appetite the next day.
Try to eat less fried, barbecued and fried foods at night, such as fried peanuts, grilled lamb kebabs, etc. They can cause adverse effects on the gastric mucosa.
The intake of fruits at night should also be moderate, do not eat fruits with more sugar, otherwise it may lead to frequent nighttime rising and affect the quality of sleep.
Overly salty things should also be avoided as much as possible. Because this will make you keep drinking water, but also make it difficult to discharge water, both to affect sleep, but also easy to lead to facial swelling the next day.
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