To answer your questions:
1) It is not so much as accuracy, but they test for different things. Electromyography (EMG) measures the electrical discharges made by the muscles. Nerve conduction studies (measuring nerve conduction velocity) determine how well individual nerves can transmit electrical signals. The MRI would look for any structural abnormalities that can cause nerve dysfunction.
2) Other options for restenosis would include lumbar epidural injections, as well as soft-tissue injections. A neurosurgeon would be the appropriate referral to obtain.
3) I cannot make any specific surgical comments without being personally involved in your case. The neurosurgery evaluation would be an appropriate next step.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b