Electrodiagnostic Testing
Getting You Back to What Matters
When the visual findings can't explain the symptoms well enough
Electrodiagnostic testing, also known as EMG or EMG/NCV testing is an important tool in evaluating pain, tingling, numbness, weakness, loss of coordination, and basically any complaint that involves the nerves and/or muscles.
While tests such as X-rays, CT scans, MRI scans, bone scans, and the like give important information about how structures in our bodies appear, there are times when the visual findings on CT, MRI, etc. do not explain the patient's symptoms and exam findings well enough.
A Useful Tool to Determine if Surgery is Necessary
Sometimes the findings are treated, with or without surgery, yet the symptoms continue or spread.
There are other occasions when the surgeon wants to know more about the severity of nerve damage before moving forward with surgery so that a better discussion can be had with the patient about what to expect after surgery. Electrodiagnostic testing (EMG/NCV) is very helpful in these situations.
Electrodiagnostic tests are generally two-part tests. The first part consists of putting small ring or pad electrodes on the skin along the course of certain nerves, using a probe to stimulate the nerve through the skin and recording the response. This response will look like a waveform picture on the screen. The second part of the study involves placing a very small, thin needle into certain muscles and recording the activity. The results are combined to develop a diagnosis, rule out other diagnoses, and discuss severity.
At OrthoSouth®, the physicians performing electrodiagnostic testing work closely with our surgical and non-surgical physicians and providers to get the most complete diagnoses possible so that care can be optimized.
The following experienced and skilled OrthoSouth® doctors are available to conduct your EMG/NCV testing:
Frequently Asked Questions About EMG/NCV
What is an EMG/NCV test?
An EMG (electromyography) and nerve conduction study (NCV/NCS) are diagnostic tests that measure how well your nerves send signals to your muscles.
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NCV/NCS evaluates nerve signal speed and strength.
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EMG measures electrical activity within muscles.
Together, they help diagnose nerve damage, pinched nerves, and muscle disorders.
Why would I need an EMG test?
Your provider may recommend EMG/NCV if you have:
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Numbness or tingling in arms or legs
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Persistent neck or back pain with radiating symptoms
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Muscle weakness
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Suspected pinched nerve
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Carpal tunnel symptoms
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Sciatica
These tests are often ordered when MRI or imaging results don't fully explain your symptoms.
What conditions can EMG/NCV help diagnose?
Electrodiagnostic testing helps evaluate:
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Pinched nerves (radiculopathy)
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Carpal tunnel syndrome
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Ulnar nerve compression
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Sciatica
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Peripheral neuropathy
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Nerve injuries
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Muscle disorders
Your results help determine the severity of nerve involvement and guide treatment planning.
What happens during the test?
The study has two parts:
Nerve Conduction Study (NCV):
Small electrodes are placed on the skin. Mild electrical pulses measure nerve response.
Electromyography (EMG):
A thin needle electrode evaluates electrical activity inside selected muscles.
The test is performed in-office. No sedation is required.
Does EMG/NCV hurt?
Most patients describe the test as uncomfortable but manageable.
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The nerve conduction portion feels like quick electrical taps.
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The needle EMG may feel like a brief pinprick.
Mild soreness afterward is normal and temporary.
How long does the test take?
Most studies take between 30 and 60 minutes, depending on how many nerves and muscles need to be evaluated.
We will give you a time estimate when scheduling.
How do I prepare for my EMG test?
To prepare:
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Shower the day of your appointment.
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Do not apply lotions, creams, or oils.
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Wear comfortable clothing.
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Continue medications unless instructed otherwise.
If you take blood thinners or have a pacemaker, notify us before your appointment.
Is the test safe?
Yes. EMG and nerve conduction studies are considered very safe.
Possible side effects include temporary muscle soreness or minor bruising at needle sites. Serious complications are rare. Your physician can go over additional safety questions in more detail.
When will I receive my results?
In many cases, we may be able to discuss preliminary findings with you the same day.
A final report is sent to your referring provider so your care plan can move forward without delay.
Will this test determine if I need surgery?
EMG/NCV is one piece of the puzzle.
It helps us determine the severity of nerve involvement and assists with decision making about whether surgical or non-surgical treatment is appropriate. We combine these results with your physical exam, imaging, and symptoms to make informed decisions.
Can I drive myself home?
Yes. You may resume normal activity after the test unless your provider advises otherwise.
Do I need a referral for EMG testing in Memphis?
OrthoSouth providers conduct EMG/NCV on OrthoSouth patients who are referred for the service internally. We do not accept outside EMG/NCV referrals at this time.
Referral requirements to a specialist vary depending on your insurance. Our team can guide you through scheduling and verify what is needed before your appointment.
Call OrthoSouth to schedule your initial consult with a specialist or book an appointment online here.
