there are quite a few sources, which state the benefits of ketosis on the nervous system. E.g. as a treatment for epileptics, to reduce the severity and frequency of their seizures. Interestingly, ketosis seems to change a lot in the way our brains are working.
I always experienced difficulties to stay focused while in the lectures at the university, but now that I'm in ketosis for a few weeks, it seems that my mind has become much clearer. Like drinking a bottle of green tea right before the lecture... save that I didn't. (Besides, it would be really annoying to race to the restroom 5 times during the lesson :D )
Can anybody confirm my observations? And the even more interesting question: Who knows papers, studies etc. which focus on the neural effects of ketosis?