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Doctor insights on: Nerve Conduction Velocity 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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Is conduction velocity the same is nerve conduction velocity?

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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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 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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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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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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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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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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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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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 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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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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What happens during a nerve conduction study?

EMG: This test evaluates nerve and muscle fnctn to determine if it is normal. Testing of nerves involves applying an electrical shock over a nerve and recording the response over a muscle connected to the nerve. Results can be compared to normal values for voltage and velocity, and both motor and sensory function can be included. The muscle can directly be tested using a small needle. Very safe! ...Read more

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Common peroneal nerves, f-waves of CPN & PTN, H-reflex, SNAP of sural nerves and superficial peroneal nerves are not recordable.( report of NCV test)?

NCV Test: A lot of times these NCV tests are inconclusive or need to be repeated. Do you have any symptoms like numbness or tingling? Any history of diabetes or peripheral neuropathy? These disorders may explain those findings. Nerve trauma can also be a possible etiology. ...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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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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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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Occ. tingling/numbness in hands & feet. Blood tests,MRI, EEG normal. EMG of legs/feet(normal) EMG of arms(mild CTS,pinched nerves) What could this be?

See details: It is impossible to be specific without being able to perform a neurologic evaluation in person. Have you seen a neurologist yet? If not, see one. If you have, ask that doctor, ...Read more

Nerve Conduction Velocity (Definition)

Nerve conduction velocity is the speed with which a nerve transmits it's signal on EMG testing. It can be slowed by damage by compression, or by medical conditions such as ...Read more