I have previously pointed to Ratey's book Spark! but there is more out there on this topic. Tim Anderson - Becoming Bulletproof - has developed some cool ideas around applying simple tactics, like crawling. Tim also expose me to the book Smart Moves by Carla Hannaford, which was the foundation for some of his ideas, again a very useful read.
Todd Hargrove also has a huge wealth of thinking on this topic.
Anyway, I was prompted to think about this again by this report of how Exercise improves memory, thinking after stroke
However, Ms. Marzolini says, "these results provide compelling evidence that by improving cardiovascular fitness through aerobic exercise and increasing muscle mass with resistance training, people with stroke can improve brain health."