What's do I need a brain MRI and EEG if my CT scan was normal?

Hello, I have had many health problems over the past several years. Tonsillectomy, sinus surgery, and cervical C5-6 fusion 3 years ago. I now have C4-5 herniation and trying to just deal with it because I don't want another surgery. I am/was on several medications ( oxycodone, Robaxin, Naproxan, Nortriptalyn, Wellbutrin). The Nortipalyn and Wellbutrin were newer medications. After Being on the Wellbutrin for 4 weeks I had a first time seizure(seizures are common with both of these medications). While seizuring, I fell from a standing position and fell on the back of my head. Was rushed in for a CT scan that came back normal, and my head stapled. Saw a neurologist who said I now need a EEG and MRI before I can start driving again. I told him I don't have any problems with my head. It's my neck that hurts.

So my question is why would I need a MRI and EEG if the CT was normal and I'm not complaining of head problems. What does a MRI show that a CT scan can't?