What Is NCV/EMG Testing?
NCV (nerve conduction velocity) and EMG (electromyography) are diagnostic tests used to evaluate how well your nerves and muscles are functioning. NCV testing measures how quickly electrical signals travel along a nerve, while EMG measures the electrical activity within a muscle.
Together, these tests can help identify conditions like nerve compression, radiculopathy, or peripheral neuropathy, and pinpoint exactly where along a nerve’s path the problem is occurring, information that’s difficult to obtain through physical exam or imaging alone.
How NCV/EMG Testing Works
NCV/EMG testing involves two related components, often performed together during the same visit.
NCV testing
Small electrodes are placed on the skin, and a mild electrical stimulus is applied to measure how quickly signals travel along the nerve.
EMG testing
A thin needle electrode is inserted into specific muscles to record their electrical activity, both at rest and during contraction.
Results and analysis
We interpret the results in the context of your symptoms to identify the specific nerve or muscle issue involved.
Benefits of NCV/EMG Testing
- Pinpoints the exact source — of nerve-related symptoms, including the specific nerve and location involved.
- Distinguishes between conditions — that may have similar symptoms but very different underlying causes.
- Provides objective data — to guide and confirm the effectiveness of your treatment plan.
- Helps rule out serious conditions — that may require a different course of care.
- Informs realistic expectations — for recovery based on the extent of nerve involvement.
What to Expect
NCV/EMG testing is typically recommended when nerve involvement is suspected but needs further clarification.
- A discussion of your symptoms and why testing is recommended
- The NCV portion, involving mild, brief electrical stimulation — a quick tingling sensation
- The EMG portion, involving a thin needle electrode inserted into specific muscles, which may feel like a brief pinch
- A review of your results and how they inform your treatment plan
Good to know
NCV/EMG testing involves some mild discomfort but is generally well tolerated. call 386-400-3620 with any questions about what to expect.
Frequently Asked Questions
Does NCV/EMG testing hurt? +
The NCV portion involves a brief tingling sensation from mild electrical stimulation. The EMG portion, which uses a thin needle electrode, may feel like a brief pinch. Most patients tolerate the testing well.
Why would I need this testing instead of just an X-ray or MRI? +
Imaging shows the structure of your spine and joints, while NCV/EMG testing shows how your nerves and muscles are actually functioning, which is important information imaging alone can’t provide.
What conditions does NCV/EMG testing help diagnose? +
It’s commonly used to evaluate suspected nerve compression, radiculopathy, carpal tunnel syndrome, and peripheral neuropathy, among other nerve-related conditions.
How long does testing take? +
It typically takes 30 to 60 minutes, depending on how many nerves and muscles need to be evaluated.
Will I get my results right away? +
We review your results and discuss what they mean for your treatment plan as part of your visit.
Is any special preparation needed before testing? +
We’ll give you specific instructions ahead of time, but in general, avoiding lotions on the skin and wearing comfortable clothing that allows access to the testing area is helpful.
