Someone asked me this question on Quora. Now I have been really very busy and this slipped out of my sight. Revisiting my answering requests, this question caught my attention.
I personally had no knowledge of it and I had to read on it. The best answer I found was of Bill Skaggs a Ph.D. in Neuroscience who wrote:
I personally had no knowledge of it and I had to read on it. The best answer I found was of Bill Skaggs a Ph.D. in Neuroscience who wrote:
The brain is an enlarged ganglion at the front of the spinal cord. Some types of worms, including the leech, have an additional enlarged ganglion at the other end of the spinal cord, which is sometimes called a "tail brain". There were once speculations that some types of dinosaur also had a similar "tail brain", but those are now discounted.
Another interesting point surfaced when I read the reply by another person on Quora, Phil Maguire, who stated that:
It was thought that sauropods and stegasaurus had a second brain near the base of the spine.
Current opinion is that this isn't the case. However, they are overlooking the real problems of speed of transmission for nerve signals to travel from your hindquarters to your brain when you're the size of a house.