I watched a show the other day on sleeping or dreaming. Not sure what it was. I only cought a little bit of it. Anyway, they had some big names in the lucidity institute on the show. They were saying that when you fall asleep, one of the first parts of your brain to fall asleep is the logic center of your brain.
So when you have a lucid dream, does this part of your brain wake up? I have had only 1 lucid dreams in my life. the first one was an accident, the second was caused using a wild. In both cases, I remember being able to think very clearly.