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I once remember reading (15 years ago) that dinosaurs had two brains. One for their head and another one for their digestive functions. What is the current opinion on this theory? Has more evidence become available?

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the enteric nervous system (which humans also have) has been called "second brain" , but of course doesn't form an actual brain – Michael Kuhn May 29 '12 at 15:24
up vote 4 down vote accepted

It would appear that at one time it was thought that a 'gap' in the skeleton of a Stegosaurus was a space for another brain. This is now thought to be a storage space for extra food.

Googling your question brings up a number of answers along this line;

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Oh so it was a stegosaurus. Any current scientific findings that you are aware of? – Gabriel Fair May 29 '12 at 13:32
nice question - another childhood myth dispelled! – shigeta May 29 '12 at 16:38

I saw that some big dinosaurs got a second neuron group near their back legs to overcome some nerves signal delay problems. Not sure about that.

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Could you add some citations or references to substantiate your answer? – kmm May 7 '13 at 12:01
I can't. I saw that on TV, it was a documentary from the BBC i guess. – user1254498 May 7 '13 at 12:46
A small talk about nerves delay in dinosaurs. Not talking about brains, but still interesting. – user1254498 Jun 10 '13 at 15:28

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