Please bear with me since I am not really knowledgable on Qigong and recently am looking into it. I realize that this is an established order of controlled breathing, concentration, and simple movements.
Now, how can restoring the 'flow' of Chi through your body be concentrated so as to affect your mental capacities? Is it possible? Can you channel this flow of energy to your brain so as to increase memory and recall? Can this have an adverse effect on the brain?
These are ideas that have occurred to me as I read up on different types of Qigong. It is my personal preference to apply Qigong in this way. However, If I'm totally off base, by all means, point it out to me! 
Thanks for your time.