Mysteries of sleep

  • “Sleep changes the cellular structure of the brain. It appears to be a completely different state…
  • During sleep a plumbing system called the glymphatic system may open, letting fluid flow rapidly through the brain.
  • Certain brain cells, called glia, control flow through the glymphatic system by shrinking or swelling. Noradrenaline is an arousing hormone that is also known to control cell volume. Similar to using anesthesia, treating awake mice with drugs that block noradrenaline induced unconsciousness and increased brain fluid flow and the space between cells, further supporting the link between the glymphatic system and consciousness.”


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