There is A 2nd Brain in Your Gut

McKayMachina

Some info:

http://www.scientificamerican.com/article.cfm?id=gut-second-brain

As Olympians go for the gold in Vancouver, even the steeliest are likely to experience that familiar feeling of "butterflies" in the stomach. Underlying this sensation is an often-overlooked network of neurons lining our guts that is so extensive some scientists have nicknamed it our "second brain".

A deeper understanding of this mass of neural tissue, filled with important neurotransmitters, is revealing that it does much more than merely handle digestion or inflict the occasional nervous pang. The little brain in our innards, in connection with the big one in our skulls, partly determines our mental state and plays key roles in certain diseases throughout the body.

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http://www.bbc.co.uk/news/health-18779997

I recommend reading this one to learn about impacts on hunger, satiety and even gastric bypass.

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Pretty interesting stuff! What do you guys think?