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Doctor insights on: Sense Nerve Conduction Test

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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

Nerve (Definition)

The brain and spinal cord communicates with what is occurring in the internal organs and limbs by nerve fibers where are like electrical wires with insulation (myelin) and the "copper" (axon). Within brain and spinal cord these nerves connect to other nerves via synapses on both axons and dendrites. A nerve can carry information regarding sensations, and ...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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Can you have peripheral neuropathy with negative nerve. Conduction tests? Tested positive for bilateral carpal tunnel

Can you have peripheral neuropathy with negative nerve. Conduction tests? Tested positive for bilateral carpal tunnel

Carpal tunnel or PN: If your nerve conduction test showed you have carpal tunnel syndrome, that is your diagnosis. Your nerve conduction test is not normal or negative if this is the diagnosis. This is a good test for distinguishing these two conditions. It is possible to have rare kinds of neuropathy with a normal nerve conduction test- this is why it is important to have an interview and exam with the test minder ...Read more

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

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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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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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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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 nerve conductive study and emg prove nerve damage or nerve pain like sciatica? Can you have sciatic pain and normal results ftom these tests

Does nerve conductive study and emg prove nerve damage  or nerve pain like sciatica? Can you have sciatic pain and normal results ftom these tests

Shows function loss: Emg and nerve conduction studies are very good at detecting nerves that have been damaged to the point where the nerves are losing function, but are not always sensitive to less severe damage that is causing nerve irritation without loss of function, or to disease elsewhere in the body, such as in the brain or spinal cord. ...Read more

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Is it possible for an MRI scan to miss pinched nerve/ blocked nerve signals?

Is it possible for an MRI scan to miss pinched nerve/ blocked nerve signals?

Possible but: It is unlilkely to miss significant nerve pressure problems it dosen't measure nerve signals, an EMG can measure those MRI is a good test to show surgically significant problems alternative cervical ct myleogram but has risks overmri. ...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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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 much conduction velocity in optic nerve?

How much conduction velocity in optic nerve?

VER: A very nice test can be done to measure the optic nerve conduction velocity. This is the visual evoked response or ver. A p100 can be measured that can be compared with the normal range for the laboratory where the testing is done. Delays in conduction can be seen in a variety of disorders, most common with the diagnosis of multiple sclerosis. ...Read more

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What is an emg nerve test used for?

What is an emg nerve test used 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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Podiatrist suspects I have tarsal tunnel and suggests I get a nerve conduction test to diagnose. How likely will the nerve test confirm tarsal tunnel?

Podiatrist suspects I have tarsal tunnel and suggests I get a nerve conduction test to diagnose. How likely will the nerve test confirm tarsal tunnel?

Tarsal tunnel: This is very uncommon, but the clinical history and EMG/NCV can be helpful in determining a distal tibial neuropathy associated with tarsal tunnel syndrome. There are technical challenges at times evaluating this, but typically those occur in older individuals. ...Read more

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Can carpal tunnel be present if nerve conduction study is negative? Thank you

Can carpal tunnel be present if nerve conduction study is negative? Thank you

Yes. : Yes. The diagnosis of carpal tunnel syndrome (cts) has classically been made on clinical grounds, i.e. The symptoms and physical findings that the patient exhibits. Nerve conduction studies and electromyography (EMG) can be helpful in determining the severity of median nerve compression, but in patients with classical symptoms and signs, I do not believe they are necessary to make the diagnosis. ...Read more

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Pinched sciatic nerve. Neg emg test. Vibration sensation in foot. Would cortisone shot relieve vibration and enpingment? Have done pt for 5 months.

Pinched sciatic nerve. Neg emg test. Vibration sensation in foot. Would cortisone shot relieve vibration and enpingment? Have done pt for 5 months.

Possibly: Have a pain specialist review your history, exam and MRI results and see if a targeted injection could help. Stop the pt. It obviously is a waste of time and money. ...Read more

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Altered sensation in trunk and limbs, nerve conduction test-normal, bloods ana-positive 160 titre and ena-negative, having mri, what does this mean?

Altered sensation in trunk and limbs, nerve conduction test-normal, bloods ana-positive 160 titre and ena-negative, having mri, what does this mean?

Not much: Not much to go on. Basically everything is normal. The tests so far rule out generalized peripheral nerve diseases and serious autoimmune diseases. The MRI will evaluate for central nervous system causes. ...Read more

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What does denervation in calf area on EMG mean? Also nerve conduction test showed differences in ankles. Bad signs?

Peripheralneuropathy: What you are describing is not normal. Do you diabetes or any type disease that can cause a peripheral neuropathy? Should discuss with your physician and or a neurologist. Without any other symptoms, unlikely to be from spinal source ...Read more

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Should i possibly get a nerve conduction test?

Should i possibly get a nerve conduction test?

Depends: It really depends on what the possible problem is. Nerve conduction tests are usually done with electromyography. The test is non-invasive and an office procedure that does not require anesthesia. The electromyography portion involves needles. ...Read more

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What can I expect from an emg, or nerve conduction test?

What can I expect from an emg, or nerve conduction test?

Tolerable discomfort: There are two parts to an EMG test: nerve conduction studies and electromyography. Nerve conduction studies feel like a short, electrical impulse and are, in a word, annoying. Emg uses a fine wire electrode to record from muscles and feels like an insect bite. It is not as bad as a shot or IV or blood draw. Several muscles and several nerves are usually checked. ...Read more

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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 does a normal emg/nerve conduction test tell you?

What does a normal emg/nerve conduction test tell you?

Interpretation: Assuming the test was comprehensive and technically competent, this can eliminate large fiber neuropathy, and most muscle diseases. But does not eliminate small fibre neuropathy, or disease of brain and/or spinal cord. Symptoms due to intermittent nerve compression are not fully excluded either. ...Read more

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My body is burning all over, i had a nerve conduction test which was normal, i cannot stand this burning cold sensation in my body. Please help!!

More information: It sounds like you are getting to a diagnosis. What did the doctor say that did the nerve conduction test? What medications if any are you on? Need more information to help. Please reconnect with the doctor who did your testing. If not useful go to ER for quickest evaluation. ...Read more

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What does a nerve conduction test and a sleep study show or is ordered for ??? Thanks

What does a nerve conduction test and a sleep study show or is ordered for ??? Thanks

Different studies: Two very different studies, Nerve conduction tests for nerve injury or neuropathy Sleep study usually done to find sleep apnea or occasionally sleep disorder. ...Read more

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What to do if I have to have a nerve conduction test on my upper limbs in hospital?

No preparation need: Your test will be done with mild electrical shocks, and recordings of the stimulation results. An EMG part will use small needles, and the greatest risk might be a small bruise. If done thoroughly and fully, answers for location and severity of nerve problem will be uncovered. ...Read more

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Two part ? Whats the difference bettween an EMG and nerve conduction test AND is it more painful or less if you have nerve damage?

Two part ? Whats the difference bettween an EMG and nerve conduction test AND  is it more painful or less if you have nerve damage?

There are two parts: Nerve conduction study: Electrodes are put on skin over a nerve. Mild electric shocks (not painful) cause axons to transmit action potentials (nerve impulses). Velocity & amplitude (speed & strength) of impulses are measured. This measures nerve's function. Electromyogram: Needle electrodes are stuck in muscles innervated by a nerve. Electrical activity of muscle => data on nerve function. ...Read more

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What does denervation in calf area on EMG mean? Also nerve conduction test showed differences in ankles. Bad signs?

Peripheralneuropathy: What you are describing is not normal. Do you diabetes or any type disease that can cause a peripheral neuropathy? Should discuss with your physician and or a neurologist. Without any other symptoms, unlikely to be from spinal source ...Read more

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R there alternatives to nerve conduction test ( have TOS+arm pain)? Hear can be very painful. Would drinking gin before change the results of test?

Buck up, Dennis: I've had 3 EMG/NCSs. The nerve conduction test part is mildly uncomfortable. The electromyogram is where they stick little electrodes in e.g. your toe and tell you to move the toe. There ARE painful moments there, but that part usually lasts only about 5 min, 10 tops. Don't drink before. The IMPORTANT question always is: Will the results change MANAGEMENT? Never shy away from asking that. ...Read more

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Podiatrist suspects I have tarsal tunnel and suggests I get a nerve conduction test to diagnose. How likely will the nerve test confirm tarsal tunnel?

Tarsal tunnel: This is very uncommon, but the clinical history and EMG/NCV can be helpful in determining a distal tibial neuropathy associated with tarsal tunnel syndrome. There are technical challenges at times evaluating this, but typically those occur in older individuals. ...Read more

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I was diagnosed with polyneruopathy after a nerve conduction test and i think a emg . Now my knee is swollen and hurting . What happens now ?

I was diagnosed with polyneruopathy after a nerve conduction test and i think a emg . Now my knee is swollen and hurting . What happens now ?

Could be something: Serious. If you did not injure it, possibilities are gout, pseudogout, or infection. If you had an injury, it is probably bleeding from meniscus or ligament. Or it could be thrombophlebitis. Go see your doctor immediately. ...Read more

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Over the past 3 yrs. I've had dizziness, migraines, spasm, cognitive & memory problems, etc. Neg MRI, LP, nerve conduction test. What's wrong with me?

Over the past 3 yrs. I've had dizziness, migraines, spasm, cognitive & memory problems, etc. Neg MRI, LP, nerve conduction test. What's wrong with me?

Chronic headaches: can be treated in various ways at headache clinics at some local hospitals. Your doc may refer you or search one out yourself. You can also consider natural approaches such as a food sensitivity panel from Great Plains Laboratory in KS. Peace and good health. Biofeedback and clinical hypnosis are also possibilities. ...Read more

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Feet are always numb and sometimes (mostly mornings and night) painful.Test for diabetic neg.Nerve conduction test neg.No spine prob.What tests needed?

Feet are always numb and sometimes (mostly mornings and night) painful.Test for diabetic neg.Nerve conduction test neg.No spine prob.What tests needed?

Not much left: You have eliminated a lot. Just a few more things to do. Consider doing bloodwork, if you haven't. Also consider a pad exam with a local area podiatrist. This is a noninvasive vascular assessment. ...Read more

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Can I have a muscle/nerve conduction test done by my neurologist with an ICD implant?

Is there problem?: Not clear why you might have any concern regarding an EMG test, which has no real absolute contra-indications. If your doctor feels this could be useful, allow this to be done. Doubt you will experience any more issues save mild discomfort due to techniques. ...Read more

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Altered sensation in trunk and limbs, nerve conduction test-normal, bloods ana-positive 160 titre and ena-negative, having mri, what does this mean?

Not much: Not much to go on. Basically everything is normal. The tests so far rule out generalized peripheral nerve diseases and serious autoimmune diseases. The MRI will evaluate for central nervous system causes. ...Read more

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I have cramping an tingling down the right side of my knee to my ankle. I've had a nerve conduction test an MRI to check for nerve entrap. But nothin?

I have cramping an tingling down the right side of my knee to my ankle. I've had a nerve conduction test an MRI to check for nerve entrap. But nothin?

First off,: You should realize that a nerve conduction test doesn't offer accuracy of 100%. There are false negatives results. Mri's are tricky too. Particularly with certain nerve entrapments and who is reading them. Nerves generally don't cramp, muscles do. Tingling is usually nerve related. The nerve in your case i would look for is by the fibular head and/or in the back. A good physical exam is key. ...Read more

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Weakness + shooting pain in arm, wrist, clawing of 3rd and little figure. clear nerve conduction test, what else could it be other than nerve damage?

See hand surgeon: You may possess a rheumatological condition affecting tendons in wrist and hand, but if nerve testing was done within 3-4 weeks of onset, an emerging nerve problem could be missed. Sounds like a significant problem. See a hand specialist, and get expert advice. ...Read more