economics

March 12, 2010

Why do we Sleep? Scientists are Still Trying to Find Out

Filed under: Uncategorized — ktetaichinh @ 3:44 am
Tags: ,

http://blogs.nationalgeographic.com/blogs/news/chiefeditor/2009/08/why-we-sleep-is-a-mystery.html?soure=fb_03112010

What is most remarkable about sleep, according to Siegel, is not the unresponsiveness or vulnerability it creates but rather the ability to reduce body and brain metabolism while still allowing a high level of responsiveness to the environment.

“The often cited example is that of a parent arousing at a baby’s whimper but sleeping through a thunderstorm. That dramatizes the ability of the sleeping human brain to continuously process sensory signals and trigger complete awakening to significant stimuli within a few hundred milliseconds.”

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