Pleasure stimulation.....

No this is not an X rated post... Researchers at the University of Columbia have learned how to get mice to react to musical notes to release the feel good neurotransmitter dopamine into their brains (anyone want to volunteer?).  The researchers are learning how the mice can repeat the pleasurable experience.  If mice can learn this process and we can see how the pattern is created, then we can learn how this is implicated in the human brain.  They are learning how the patterns are shaped and how this can lead to not so pleasurable experiences that can lead to addictions and OCD.  These pleasurable experiences have hijacked the brain.  There is a law in psychology that states that positive reinforcement will lead to actions that are repeated.  This is called Thorndikes Law.
LENS neurofeedback can help the brain to reset itself and have the right functioning pattern.  This brain pattern is then a pleasure in itself.