An EMG and nerve conduction study checks how well your muscles and the nerves that control them are working.1 EMG reads the electrical signals your muscles make at rest and in use; the nerve conduction study measures how fast and how well electrical signals move along your nerves, because a damaged nerve has a slower and weaker signal.1 At Regenerve the testing is performed on site, so evaluation and results happen in one place.
What EMG reads
MedlinePlus describes the principle simply: a healthy muscle should not give off any electrical signals when you are not moving it.1 If a muscle is damaged, it may show electrical activity at rest, or activity that is not normal during use.
That is why EMG is a functional snapshot rather than a picture. It tells you how the muscle is behaving right now, which is information an image cannot give you.
What the nerve conduction study measures
StatPearls describes nerve conduction studies as providing data on nerve conduction velocity, the amplitude of the compound motor action potential, and the sensory nerve action potential.2 Conduction velocity measures the speed of conduction in large myelinated axons of the peripheral nerve.
That last detail is the one patients most often need. The study is weighted toward large myelinated fibers, which is why it can read normal in a person whose symptoms come from small fibers.
Why the two tests are paired
MedlinePlus notes that the tests can be done separately but are usually done at the same time.1 The combined pattern is what turns a set of abnormal numbers into a usable map of where the problem sits.
What the results can and cannot answer
StatPearls lists the clinical indications for nerve conduction studies and EMG as studying pathophysiology, assessing disease severity, identifying the level of injury and predicting prognosis.2 Electrodiagnostic studies also help localize lesions, separate sensory from motor involvement, and distinguish axonal from demyelinating patterns.2
What they do not do is name the cause. A slowed conduction velocity does not say whether the driver is metabolic, nutritional, autoimmune, toxic or structural, and that is the question that determines treatment.
A normal result is information, not dismissal
A normal study means the specific nerves and muscles tested did not show measurable abnormality. It does not mean the symptoms are imagined, and it does not close the work-up.
When symptoms point at small fibers — burning, temperature change, altered sweating — a normal large-fiber study is an expected finding rather than a contradiction.
How we use the result at Regenerve
The electrodiagnostic result is one input into identifying which driver is causing the nerve injury. From there we build a physician-directed plan around that driver rather than around the word “neuropathy”.
Our services include on-site electrodiagnostic testing, class 4 photobiomodulation, class 3B cold laser, whole-body infrared, metabolic and nutritional care, and VNG balance testing, which is a diagnostic test of inner-ear balance function rather than a treatment. Orthobiologic injections (PRP and BMAC) are offered in selected situations. The full list is on the Regenerve services page.
We do not promise nerve regeneration, reversal or cure, and we do not publish a success rate for our protocol.
We are at 4477 Woodson Rd #104, St. Louis, MO 63134, minutes from St. Louis Lambert International Airport, and we see patients from the St. Louis region, Missouri and Illinois. Directions and hours are on our St. Louis neuropathy treatment page.
Start with your Nerve Damage Score
If you are trying to decide whether nerve testing is your next step, the free five-question Nerve Damage Score is a fast way to focus the first visit.
Frequently asked questions
What does an EMG and nerve conduction study appointment involve?
Both tests are usually done in the same visit. EMG looks at the electrical signals your muscles make at rest and when used, and the nerve conduction study measures how fast and how well signals move along your nerves. See small fiber neuropathy symptoms and testing.
My EMG was normal but my feet still burn. What does that mean?
It means the tested nerves and muscles did not show measurable abnormality, not that nothing is happening. Nerve conduction velocity measures conduction in large myelinated axons, so a small-fiber problem can sit underneath a normal study. See peripheral neuropathy of the feet symptoms.
What questions can the results actually answer?
StatPearls lists the clinical indications as studying pathophysiology, assessing disease severity, identifying the level of injury and predicting prognosis. They are answers to specific questions rather than a single verdict. See the hidden drivers of peripheral neuropathy.
Does an abnormal result confirm diabetic neuropathy?
No. An abnormal study shows that nerve function is impaired; it does not identify the cause, and more than one driver can be present at once. The driver work-up continues after the electrodiagnostic result. See diabetic peripheral neuropathy treatment in St. Louis.
Sources
- MedlinePlus, U.S. National Library of Medicine. “Electromyography (EMG) and Nerve Conduction Studies.” Last updated April 10, 2024. https://medlineplus.gov/lab-tests/electromyography-emg-and-nerve-conduction-studies/
- Ramani PK, Lui F, Arya K. “Nerve Conduction Studies and Electromyography.” StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing. Last updated February 10, 2025. https://www.ncbi.nlm.nih.gov/books/NBK611987/