Arab Today, arab today brain cleans itself during sleep
Last Updated : GMT 01:22:22
Arab Today, arab today
Arab Today, arab today

Brain cleans itself during sleep

Arab Today, arab today

Arab Today, arab today Brain cleans itself during sleep

Washington - XINHUA

Scientists said Thursday they have found what could be sleep\'s basic purpose: it clears the brain of toxic metabolic byproducts. The findings, published in the US journal Science, revealed that the brain\'s unique method of waste removal, dubbed the glymphatic system, is highly active during sleep, clearing away toxins responsible for Alzheimer\'s disease and other neurological disorders. Researchers from the University of Rochester, New York, also found that during sleep the brain\'s cells reduce in size, allowing waste to be removed more effectively. \"This study shows that the brain has different functional states when asleep and when awake,\" said Maiken Nedergaard of the University of Rochester Medical Center and senior author of the study. The purpose of sleep is a question that has captivated both philosophers and scientists since the time of the ancient Greeks. While recent findings have shown that sleep can help store and consolidate memories, these benefits do not appear to outweigh the accompanying vulnerability, leading scientists to speculate that there must be a more essential function to the sleep-wake cycle. The new findings hinged on the discovery last year by Nedergaard and her colleagues of the glymphatic system, a previously unknown system of waste removal that is unique to the brain. The system acts like a plumbing system that piggybacks on the brain\'s blood vessels and pumps cerebral spinal fluid (CSF) through the brain\'s tissue, flushing waste back into the circulatory system where it eventually makes its way to the general blood circulation system and, ultimately, the liver, the researchers said. They speculated the glymphatic system may be more active during sleep because the amount of energy consumed by the brain does not decrease dramatically when people are at sleep. In order to prove their idea, Lulu Xie, the study\'s first author, spent two years in training mice to relax and fall asleep. Once Xie was sure the mice were asleep, she injected a green dye into their CSF through a catheterlike device in their necks. After half an hour, she awakened them by touching their tails and injected a red dye that the two-photon microscope could easily distinguish from the green. By tracking the movements of red and green dye throughout the brain, the researchers found that large amounts of CSF flowed into the brain of the mice during sleep, but not during the awake state. In all, the glymphatic system was almost 10-fold more active during sleep, they said. One waste product removed by the system during sleep is - amyloid, a protein implicated in Alzheimer\'s disease. The researchers tagged -amyloid with fluorescent tags and made the observation. They found in sleeping mice, the tags flowed out of the brain twice as fast. Another startling finding was that the cells in the brain \" shrink\" by 60 percent during sleep. This contraction creates more space between the cells and allows CSF to wash more freely through the brain tissue, the researchers said. \"These findings have significant implications for treating \' dirty brain\' disease like Alzheimer\'s,\" said Nedergaard. \" Understanding precisely how and when the brain activates the glymphatic system and clears waste is a critical first step in efforts to potentially modulate this system and make it work more efficiently.\"

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

Arab Today, arab today brain cleans itself during sleep Arab Today, arab today brain cleans itself during sleep

 



Arab Today, arab today
Arab Today, arab today Tourism shows signs of recovery

GMT 09:59 2017 Monday ,20 February

Tourism shows signs of recovery
Arab Today, arab today Sarah Belamesh designs antiques of "ceramic"

GMT 19:45 2017 Monday ,20 February

Sarah Belamesh designs antiques of "ceramic"
Arab Today, arab today Top Yemen commander killed

GMT 09:55 2017 Wednesday ,22 February

Top Yemen commander killed
Arab Today, arab today Media host Mona Iraqi stresses her show's success

GMT 15:32 2017 Wednesday ,22 February

Media host Mona Iraqi stresses her show's success
View News in Arabic - Education: تقارير وملفات
Arab Today, arab today
Arab Today, arab today
Arab Today, arab today To hold social dialogue over secondary school

GMT 07:43 2017 Wednesday ,22 February

To hold social dialogue over secondary school
Arab Today, arab today 63-Year-Old Woman Delivers Baby

GMT 12:35 2017 Tuesday ,21 February

63-Year-Old Woman Delivers Baby
Arab Today, arab today Milan laughs while Rome cries

GMT 10:28 2017 Wednesday ,22 February

Milan laughs while Rome cries
Arab Today, arab today Pluto's unruly moons

GMT 06:31 2015 Thursday ,04 June

Pluto's unruly moons
Arab Today, arab today Nissan enhances sales in most markets

GMT 14:08 2017 Monday ,20 February

Nissan enhances sales in most markets
Arab Today, arab today Competes Sweden and Germans by S90

GMT 22:36 2017 Thursday ,16 February

Competes Sweden and Germans by S90
Arab Today, arab today Janat pleased for issuing 'Good Morning'

GMT 06:41 2017 Monday ,20 February

Janat pleased for issuing 'Good Morning'
Arab Today, arab today Small ponds have outsized impact

GMT 15:53 2017 Tuesday ,21 February

Small ponds have outsized impact

GMT 06:34 2017 Sunday ,19 February

Ahmed Fahmy stresses he did not ignore singing

GMT 06:50 2017 Wednesday ,15 February

Tragic fluctuations of Bakhtiari's life revealed

GMT 14:29 2017 Monday ,20 February

Prepares to present her new collection

GMT 14:06 2017 Friday ,17 February

London to tax old cars

GMT 23:29 2017 Thursday ,16 February

Home built on sand castles-style costs $8m

GMT 05:15 2017 Tuesday ,21 February

Omega 3 can reduce asthma cases

GMT 19:16 2017 Friday ,17 February

Aziz House ready to host the tourists

GMT 13:12 2015 Saturday ,09 May

Sheikh Sultan opens Sharjah Centre

GMT 12:39 2017 Monday ,20 February

newest smartphone another winner for Huawei

GMT 19:10 2017 Friday ,17 February

Hats, scarves add beauty to women
Arab Today, arab today
Arab Today, arab today
 
 Arab Today Facebook,arab today facebook  Arab Today Twitter,arab today twitter Arab Today Rss,arab today rss  Arab Today Youtube,arab today youtube  Arab Today Youtube,arab today youtube
arabstoday arabstoday arabstoday arabstoday
arabstoday arabstoday arabstoday
arabstoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
arabstoday, Arabstoday, Arabstoday