Payton's Brain surgery

Payton is 10 years old and has epilepsy. He will be having brain surgery November 17th for the first phase of surgery to Insert electrodes into the brain. If the first surgery goes well and if we are able to have the second surgery they will go in and take out the piece of his brain affected by his seizures. We've tried different medicines and they just aren't working. He also has a vns stimulator but it isn't helping.