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The Brain Literally Starts Eating Itself When It Doesn't Get Enough Sleep

The Brain Literally Starts Eating Itself When It Doesn't Get Enough Sleep | Education 2.0 & 3.0 | Scoop.it
The reason we sleep goes far beyond simply replenishing our energy levels every 12 hours - our brains actually change states when we sleep to clear away the toxic byproducts of neural activity left behind during the day.

Weirdly enough, the same process starts to occur in brains that are chronically sleep-deprived too - except it's kicked into hyperdrive. Researchers have found that persistently poor sleep causes the brain to clear a significant amount of neurons and synaptic connections, and recovering sleep might not be able to reverse the damage.

A team led by neuroscientist Michele Bellesi from the Marche Polytechnic University in Italy has examined the mammalian brain's response to poor sleeping habits, and found a bizarre similarity between the well-rested and sleepless mice.

Like the cells elsewhere in your body, the neurons in your brain are being constantly refreshed by two different types of glial cell - support cells that are often called the glue of the nervous system.

The microglial cells are responsible for clearing out old and worn out cells via a process called phagocytosis - meaning "to devour" in Greek.

The astrocytes' job is to prune unnecessary synapses (connections) in the brain to refresh and reshape its wiring.

We've known that this process occurs when we sleep to clear away the neurological wear and tear of the day, but now it appears that the same thing happens when we start to lose sleep.

Via Wildcat2030, Miloš Bajčetić
Zahir Chaudhary's curator insight, May 27, 2017 6:07 PM
The brain needs sleep to regenerate itself!  The body also needs sleep to repair itself!

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New Information Absorbed Best After A Good Night’s Sleep

New Information Absorbed Best After A Good Night’s Sleep | Education 2.0 & 3.0 | Scoop.it
Academics from the Department of Psychology at Royal Holloway taught a group of people new words from a fictional language, which unknown to them, was characterised by a rule relating the new words to one another. They found that although learners became aware of the rule within the new language shortly after being taught it, they were unable to apply it to understanding new, untrained words until after a period of rest.

Kathy Rastle, Professor of Cognitive Psychology at Royal Holloway, said: “Teachers have long suspected that proper rest is critical for successful learning. Our research provides some experimental support for this notion. Participants in our experiments were able to identify the hidden rule shortly after learning. However, it was not until they were tested a week after training that participants were able to use that rule to understand a totally new word from the fictional language when it was presented in a sentence.”

She added: “This result shows that the key processes that underpin long-term learning of general knowledge arise outside of the classroom, sometime after learning, and may be associated with brain processes that arise during sleep.”

The research, published in the journal Cognitive Psychology also found that participants needed time to consolidate this rule-based knowledge before being introduced to new words that did not follow the rule. If the exceptions were introduced during the initial vocabulary learning session, learners were unable to develop an understanding of the general rule.

Via Miloš Bajčetić
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Your Brain on Sleep

Your Brain on Sleep | Education 2.0 & 3.0 | Scoop.it

Here are some key takeaways from the University of Notre Dame's resident sleep expert:

 

Your brain doesn’t take the night off -- In fact, it's incredibly busy. Many regions of the brain -- especially those involved in learning, processing information, and emotion -- are more active during sleep than when you’re awake.

 

Daytime naps aren't just for kindergarten -- A 90 minute nap could be as beneficial as a full night of sleep, and a 20 minute nap isn't far behind in benefits. The best time for a nap? In the afternoon, after lunch.

 

You can't just "make up" lost sleep -- Eventually, you lose so much sleep, you're not able to recover that sleep debt.

 

Even 20 extra minutes makes a big difference -- If you're not getting enough sleep, tack on 20 extra minutes on a regular basis. That alone will help you begin to reap the brain-building benefits of sleep.


Via iPamba, Miloš Bajčetić
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