http://www.temple.edu/ispr/examples/ex02_02_01.html

An interactive virtual reality game was created to show doctors how epileptic flare-ups were controlled by Keppra, an epilepsy medication. It would transport doctors inside the brain where they could see Keppra actually attacking the seizure. THis was done with a virtual reality helmet. Advantages of this are that doctors can actually see how the affect of the medication on an actual seizure. Another advantage is that the game ultimately surpassed UCB Pharma's goals. At this time there are no disadvantages to be realized.