Why do we need our eight hours sleep?

Why do we need our eight hours sleep?

Why do we need our eight hours sleep?

For decades, scientists have been baffled with this question, but now researches mayhave discovered what makes us fall asleep, why a long sleep feels good and why lack of it reduces our thinking power and can lead to dementia. People who have Alzheimer’s have been found to have an excess build up of beta-amyloid. This is a protein that clumps together and causes plaque in the brain and also in the blood vessels to the brain. Longer- term build up of amyloid are linked to Alzheimer’s disease. Hence, the process of eliminating these harmful toxins in the brain may reduce risk of Alzheimer’s. Researchers found that the conscious brain cannot spare the energy to eliminate the “toxic waste” it accumulates during the day and when the waste reaches a potentially damaging level, it triggers a powerful urge to sleep. During sleep the brain is able to reconfigure itself, opening up channels between its billions of cells and flushing them with cerebrospinal fluid.  This clear colourless fluid from the brain bathes the brain and spinal cord. Besides being a transporter of nutrients and a filter of chemicals, it helps pad the brain as a shock absorber. Dr Maiken Nedergaard, a professor of neurosurgery at the University of Rochester believes that the flow of cerebrospinal fluid greatly increases during sleep. This flushes away damaging waste like the harmful protein beta-amyloid, which builds up while we are awake and alert. Dr Nedergaard said “one of the greatest mysteries in biology is why sleep is restorative and conversely, why lack of sleep impairs brain function. Sleep deprivation can reduce learning, impair cognitive performance, and is a common cause of seizures. In humans, fatal familial or sporadic insomnia is a progressively worsening state of sleeplessness. This can lead to dementia and death.   The restorative function of sleep may be a result of the enhanced removal of potentially neurotoxin waste products that accumulate in the awake central nervous system”. The research was prompted by observations that concentrations of waste in the human
brain decrease during sleep and increase after waking. The same phenomenon was observed in mice. Dr Nedergaard understood this by studying mice and related this process to “a dishwasher”. Researchers injected dye into the cerebrospinal fluid of mice and watched it flow through their brains while simultaneously monitoring brain electrical activities. They found that the dye flowed rapidly when the mice were unconscious, either anaesthetised or asleep. However, the dye barely flowed when these mice were awake.
Dr Nedergaard said “we were surprised by how little flow there was into the brain when the mice were awake”. “It suggested that the space between brain cells changed greatly
between conscious and unconscious states”. By inserting electrodes into the brain to directly measure the space between cells, researchers found that the space between the
cells increased by 60 % when the mice were asleep or anaesthetised. Dr Nedergaard said“we need sleep”. It cleans up the brain
Dr Maiken Nedergaard told the American Association for the Advancement of Science annual meeting in San Jose “prior to this finding, no one really understood how the brain exports its waste”. It had been thought that the cells broke down and recycled their own waste.
Moreover, researchers found that waste flushing can become less efficient with age, providing insights into why the onset of dementia is associated with accumulation of toxic proteins.
February 16, 2015 / 2 Comments / by / in
  • monicahenry22 says:

    My grandma has Parkinson’s disease, she is about 75 years old it was detected 7 years ago. it was very difficult to live for her, because of stiff muscles she can’t even move. L-dopa and carbidopa medicines are given, but won”t give much relief. She can”t eat food and the skin is damaging forming ganglia.my friend introduced me to perfecthealthherbalmedicine,he said perfecthealthherbalmedicine cure his father of Parkinson and COPD,so i decided to give it a try,so i emailed them,they replied and ask for my grandma details,which i sent to them via email:(perfecthealthherbalmedicine @ gmail .com),website:(www. perfecthealthherbal. weebly. com). then i purchased the herbal medicine for Parkinson diseases,after purchasing,the herbal medicine was shipped to my address,which i received within 2 days,when i received the herbal medicine i called them,and they told me how to use it,after 5 weeks of usage my grandma stiff muscles was released and she started walking,eat properly too,i was like a miracle,and our family doctor confirmed my grandma is Parkinson free,am so happy and God will bless perfecthealthherbalmedicinehome for their great work..

  • Patricia says:

    I am 56 year old who was diagnosed 4 years ago with Parkinson’s. I had severe calf pain, muscle pain, slurred speech, frequent falls, loss of balance, difficulty in getting up from sitting position, i was having a problem accepting my diagnosis, even though I read every thing I could find to read. I was put on Sinemet 3 times daily but it doesn’t seem to be helping. I also had difficulty writing. Getting in bed, turning over. i have had good luck with the Sinemet and other meds like Mirapex, but I was extremely tired of it. I have also noticed cognitive decline, but that is also related to a now-removed brain tumor.As the disease progressed all medication stopped working, i was introduced to Health herbal clinic in Johannesburg who have successful herbal treatment to Parkinson’s disease. I spoke to few people who used the treatment here in USA and they all gave a positive response, so i immediately purchased the P.D herbal remedy and commenced usage, i used the herbal supplement for only 8 weeks, all symptoms were unbelievably reversed, herbs are truly gift from God. contact this herbal clinic via their email (healthherbalclinic @ gmail. com or visit www. healthherbalclinic. weebly. com)

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