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Doctor insights on: Electromyogram

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What is electromyography (emg )?

What is electromyography (emg )?

Electromyography: Emg and ncv testing is used to help diagnose nerve and muscle problems. Examples include spinal nerve impingement (from herniated disc), carpel tunnel syndrome, ulnar syndrome, sources of radiating pain. Pain, numbness, weakness, muscle fatigue are some of the reasons that you may need an emg/ncv test. ...Read more

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Dr. Michele Arnold
1,322 doctors shared insights

Electromyography (Definition)

Emg (electromyography) is a test of your muscles and nerves. It is typically performed along with nerve conduction studies (ncs). The EMG portion involves placing a recording pin (like a fine wire antenna) into various muscles, looking for 'muscle distress signals' that could suggest nerve or muscle diseases/problems. Nerve conduction studies involve stimulating nerves ...Read more


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What is a nerve conduction velocity (NCV) test?

What is a nerve conduction velocity (NCV) test?

Part of EMG: Nerve function can be tested using electromyography, and the NCV test applies an electrical shock over the nerve to ascertain if normal velocity and voltage is present. Patterns of nerve abnormality can diagnose different diseases. ...Read more

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Difference between nerve conduction study and emg?

Difference between nerve conduction study and emg?

See below: The EMG portion uses a small needle to directly examine muscle function, and the nerve conduction part uses electrical shocks to measure nerve function. Together the study gives a good idea of the nature of the pathology and location, but can also assess the prognosis and character, and gives often guidance towards an eventual diagnosis. ...Read more

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How painful is an emg (electromyogram) test?

How painful is an emg (electromyogram) test?

Tolerable discomfort: Emg and nerve conduction studies are typically performed together. Nerve conduction studies feel like a short electrical impulse and are, in a word, annoying. Several nerves are tested. Emg involves placing a fine wire pin into various muscles-- the pin is about the size of an acupuncture needle and feels like an insect bite-- not as bad as a shot, iv, or blood draw. Several muscles are tested. ...Read more

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Emg vs muscle biopsy?

Emg vs muscle biopsy?

See different things: Both tests are useful, but they serve different purposes. Emg is a functional test that allows for the assessment of muscle irritability, as well as signs of nerve damage. It is fast, minimally invasive, and can be performed on multiple muscles in a single session. Biopsy is an anatomical test that is more invasive, but provides a deeper look at muscle structure. ...Read more

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Does a nerve conduction study and an emg hurt?

Does a nerve conduction study and an emg hurt?

Maybe uncomfortable: Most patient's tell me it was not as painful as anticipated. The ncs involves electrical stimulation of the nerves, the EMG involves inserting a very small needle into several mucles. I think most patients describe the test as uncomfortable not painful. ...Read more

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Does aspirin interfere with nerve conduction study or electromyogram results?

Does aspirin interfere with nerve conduction study or electromyogram results?

NO: Aspirin doesn't affect the results of the test but it may lead to excessive bleeding from the electrode/needle part of the EMG test. So if the doctors office recommends stopping the aspirin a week to ten days before the EMG it is likely due to the concern for possible bleeding. ...Read more

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What is an emg and nerve conduction test for?

What is an emg and nerve conduction test for?

Nerves & muscles: Emg and nerve conduction studies are used to detect abnormalities of nerves and muscles. The test evaluates nerve roots as they exit your spine, the nerve plexus, peripheral nerves, the nerve-muscle junction, and muscle itself. It can detect pinched/compressed nerves (sciatica, carpal tunnel, and others), muscle disorders, neuropathy, and many other neuromuscular conditions. ...Read more

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What are nerve conduction studies?

What are nerve conduction studies?

Test nerve function: They are a way to test the function of nerves in the body, looking for focal (like carpal tunnel) or generalized (like diabetic neuropathy) problems. They are performed by stimulating the nerve electrically (which feels like touching a doorknob after shuffling your feet on a carpet on a dry day), and recording the response. They are uncomfortable, but very helpful in clarifying a diagnosis. ...Read more

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What is a electromyogram (emg) and nerve conduction studies most commonly used to diagnosis?

Nerve ; muscle test: Emg/ncs is a test that uses small electric shocks along nerve tracts, and needles into muscles.. While small nerve fibers cannot be accurately tested, middle and large nerves will demonstrate changes in transmission times and rhythm. Muscle, will demonstrate changes in wave form, and resting potential. Neuropathy, polio, myopathy, radiculopathy, entrapped nerves, carpal, cubital/ carpal tunnel, . ...Read more

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EMG and NCV .Which test will be better to detect nerve damage.?

EMG and NCV .Which test will be better to detect nerve damage.?

Often you: need both. The NCS will check on how fast the nerves are working and the EMG will make sure the muscle is getting adequate nerve impulses. ...Read more

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Can nerve conduction tests be wrong?

Can nerve conduction tests be wrong?

No: Though there are limitations on what a nerve conductions test can show. If it shows something (and is done by a knowledgeable physician), it is definitely there. It may not be sensitive enough to pick up subtle changes. Not every nerve condition is detectable by this test. If done too soon after an injury (less than 3 weeks), may not show up. If symptoms are worsening, it is worth retesting. ...Read more

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Could taking lyrica (pregabalin) affect the results of an mr neurography study? Brachial plexus neuropathy...

Could taking lyrica (pregabalin) affect the results of an mr neurography study? 
Brachial plexus neuropathy...

Good Question: This is a great question. I have not been able to find any research suggesting that Lyrica (pregabalin) could affect the results of an mr neurogram. Mr neurograms are relatively new, so i'm sure more information on this will become available soon. ...Read more

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Is conduction velocity the same is nerve conduction velocity?

Yes: Both are ways of representing the speed at which signals travel down the peripheral nerves. Conduction velocity is decreased in diseases that damage the nerve insulation, either focally (as in carpal tunnel syndrome) or globally (as in guillan barre). ...Read more

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I'm having nerve conduction tests for carpal tunnel. Couldl the same test show guyons tunnel syndrome?

Possibly: Depends on how detailed the neurologist or other physician is in performing the emg/ncv's. If your referring physician explains the need for testing the ulnar nerve in guyon's canal it can be done... In my experience most ' routine' EMG 's of the upper extremity will note conduction 'slowing' @ the elbow( cubital tunnel) but not @ the wrist... Best of luck! ...Read more

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Help can cubital tunnel syndrome/ulnar nerve damage cause twitching muscles?

Yes to your question: Damage to any nerve that supplies a muscle may cause twitching. When the ulnar nerve is damaged, twitching may occur along the medial forearm, and many muscles that move the fingers - such as the muscles that move the fingers apart and together and the muscles that help the fingers curl and grip. http://www.neurocuro.com/peripheral-nerve-entrapment/ ...Read more

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Can ncv test be done on spinal cord and trapezius muscles ?

Can ncv test be done on spinal cord and trapezius muscles ?

Technical answers: The trapezius muscles and other muscles over the shoulder girdle can be tested using EMG/ NCV techniques. Spinal cord electrodiagnosis is best via Somatosensory Evoked Potentials. But, usually, we prefer MRI imaging of the spinal cord. ...Read more

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What doctor/specialty can order conduction test for neuropathy?

What doctor/specialty can order conduction test for neuropathy?

Any specialty: Any physician (md or do) or podiatrist can order. The test itself should be performed by a physiatrist (physical medicine and rehabilitation physician) or neurologist. ...Read more

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How to interpret nerve conduction study report?

How to interpret nerve conduction study report?

Very Hard: I would suggest if you can't figure it out, you speak with the doctor that either ordered it or the doctor that performed it. Ask them to speak in lay terms with you. Otherwise unless you have prior medical background it will be another language for sure. ...Read more

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Can an orthopedic dr diagnose carpal tunnel. Who does the conduction study.

Can an orthopedic dr diagnose carpal tunnel. Who does the conduction study.

Yes, neurologist: An orthopaedic surgeon can diagnose carpal tunnel syndrome(cts). Those patients with numbness/tingling in the thumb, index, long and 1/2 of the ring fingers and night pain don't usually need a conduction study. However, if there is any question about the diagnosis, an emg/ncv study can be performed by a neurologist of physiatrist. A board certified orthopaedic hand surgeon can provide treatment. ...Read more

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