Tuesday, January 21, 2014
By Mary
Scientists know we need sleep, but they don't know exactly why, and they've been pretty Clueless about how the brain decides when to sleep.
Caffeine can make it hard to sleep.
The longer a person or animal is awake, the stronger the urge to sleep becomes. This is known as sleep pressure. Prior studies pointed to adenosine as a trigger for sleep pressure.
The chemical accumulates in the brain during waking hours, eventually helping to stimulate the unique patterns of brain activity that occur during sleep.
If I did not get enough sleep I feel very tired.
