Can nerve damage exist even if an EMG or nerve conduction study is normal?
Answer:
Yes. Electrodiagnostic testing such as EMG and nerve conduction studies primarily evaluates larger nerve fibers. Certain conditions, including isolated small-fiber neuropathy, can be present even when those tests are normal. Physicians may use other clinical findings and testing, including skin biopsy in appropriate cases, to evaluate suspected small-fiber neuropathy.