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Home / Health / BBC – Future – Why do some people have 'two brains'?

BBC – Future – Why do some people have 'two brains'?



Take a look at your hands. Stick out your thumb as if you are trying to hitch a with your right hand. Now, try to do the same thing with your left. Can you do it?

For some people, this task is not as easy as it may be. Mike Gazzaniga, "the father of split-brain syndrome", had been studying a patient who had undergone a corpus callosotomy, a procedure which splits the brain into two halves to treat some forms of epilepsy.

When we see an image in our left eye, it is sent to the right side of the brain, and vice-versa. The image is then the dominant language center, in the left side of the brain. However, if a patient has undergone a corpus callosotomy, that pathway will be disrupted, leaving them unable to describe what they have said.

Learn more, by watching the video above.

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