September 21, 2013
Mohenjo
Medical
amazon, bbc, bbc news, brain, brain cell, brain repair, Brain Science, brain's circuitry, business, Business News, Cell (biology), cell death, Death, Dr Chiara Cirelli, Hotels, immature oligodendrocytes, Journal of Neuroscience, Myelin, oligodendrocytes, rapid eye movement, rapid eye movement sleep, REM sleep, research, Science, Science News, Scientists, Sleep, sleep lab, stress responses, technology, Technology News, travel, University of Wisconsin, vacation, why we need to sleep, Wisconsin, wisconsin team, www bbc co uk, your brain
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Scientists believe they have discovered a new reason why we need to sleep – it replenishes a type of brain cell.
Sleep ramps up the production of cells that go on to make an insulating material known as myelin which protects our brain’s circuitry.
The findings, so far in mice, could lead to insights about sleep’s role in brain repair and growth as well as the disease MS, says the Wisconsin team.
The work is in the Journal of Neuroscience.
Dr Chiara Cirelli and colleagues from the University of Wisconsin found that the production rate of the myelin making cells, immature oligodendrocytes, doubled as mice slept.
The increase was most marked during the type of sleep that is associated with dreaming – REM or rapid eye movement sleep – and was driven by genes.
In contrast, the genes involved in cell death and stress responses were turned on when the mice were forced to stay awake.
Precisely why we need to sleep has baffled scientists for centuries. It’s obvious that we need to sleep to feel rested and for our mind to function well – but the biological processes that go on as we slumber have only started to be uncovered relatively recently.
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November 28, 2012
Mohenjo
Medical
aging backwards, Brad Pitt, business, celebrities, christine clark, curious case of benjamin buttons, emotional fluctuations, entertainment, Health, Matthew 39, medicine, mental-health, Michael 42, Myelin, or white matter, Oscars, rare genetic disorders, research, Science, Science News, technology, terminal form of leukodystrophy, The Curious Case of Benjamin Buttons, Tony and Christine Clark, travel, vacation, Video
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By the looks of their home, Tony and Christine Clark are raising two rambunctious 7-year-old boys. Model train tracks and Monopoly pieces are scattered on tables and cartoons flicker on the TV set.
But the Clarks’ two sons are grown men who share only the same interests and emotional fluctuations of little boys. Like the character portrayed by Brad Pitt in the 2008 film “The Curious Case of Benjamin Buttons,” Matthew, 39, and Michael, 42, are aging backwards.
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http://shine.yahoo.com/healthy-living/real-benjamin-buttons-brothers-matthew-michael-clark-aging-193400085.html
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