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As Olympians go for the gold in Vancouver, even are likely to experience that familiar feeling of 'butterflies' in the stomach. Underlying this 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. Although its influence is far-reaching, the second brain is not the seat of any conscious thoughts or decision-making.

'The second brain doesn't help with the great thought processesreligion, philosophy and poetry is left to the brain in the head,' says, chairman of the Department of Anatomy and Cell Biology at New York–Presbyterian Hospital/Columbia University Medical Center, an expert in the nascent field of neurogastroenterology and author of the 1998 book (HarperCollins). How To Install Testdisk On Centos. Technically known as the enteric nervous system, the second brain consists of sheaths of neurons embedded in the walls of the long tube of our gut, or alimentary canal, which measures about nine meters end to end from the esophagus to the anus.