http://youtu.be/9nmVzXxdUeU

Is the Purpose of Sleep to Let Our Brains “Defragment,” Like a Hard Drive?

The images below are examples of synaptic proteins from the brains of Drosophila, the fruit fly:

via Discover Magazine

“There are still many questions around the function of sleep, but one thing seems certain: we won’t be able to understand the brain if we limit ourselves to thinking about what happens when we’re awake.”

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