Welcome to the frustrating world have having a neuro issue or issues. It's scary at first, but once you learn about what mite be happening and what can be done for you it'll be a bit less so.
Please keep in mind that many things involving the brain or nerves are diagnosed through the processes of elimination. MRI's Blood tests nerve conduction tests and a whole bunch of other tests combine to try and first determine what you DON'T have then narrow down what you might or actually have.
Here is an outline of how neuro exams start out and the what's and why's of what a neuro doc is/should be looking for when he/she sees you:
http://www.neuroexam.com/content.php?p=2
Just click onto the blue and you will get a new window and web site.
I hope this helps you understand what is happening when the doc orders tests and the like and why. I know that I'd found this web site after the fact and had a lot of 'Ah-Ha!' moments about some seemingly silly things the doc did which now make sense.
Don't be afraid to ask questions here. No question is really, too silly! Everyone here has asked them at one time or another! - j