I never cease to be amazed that people such as yourself, having undergone an expensive MRI, are left to searching on the internet to have the results explained.
I'd have thought that whoever authorised the MRI procedure would take an interest in the results and what they mean to you.
Have you followed this up with your prescribing doctor?
I know with the humble x-ray they analyse the pictures in relation to what the stated medical problem was, and you are then able to see how you are affected.
I can't believe this is not also part of the MRI process.

Personally, I'd be hot footing it to a good physiotherapist who can examine the spine and muscles very carefully and would be able to ascertain immediately where the problem areas are.