It depends some things aren't controlled by your brain, they are reflexes that can not be changed, I don't remember enough biology to know if dilation is a reflex. Even if it isn't it is probably controlled by the part of the brain that doesn't involve decision making or "thinking", so in short my guess would be that you probably couldn't do it. Even if one were able to, I don't really see how it would be helpful, or even why anyone would want to do it? Why do you want to know?
Last edited by albania; 10-19-2005 at 04:28 PM..
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