After just a quick look at the test results, I would think that an MRI of your spine might be a good starting spot since possible radiculopathy is mentioned. You don't need to have back pain to have spinal problems.

Many times an MRI is used to rule out some spinal possibilities as well as look for spinal issues. Tracking down the trouble spot of an electrical short is more difficult in the human body than in a building. Good luck. Hope you find a doc that will investigate and pay attention to you.