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Median Sensory Nerve Conduction Velocity (for nerve function evaluation)

Published: August 9, 2026Updated: August 16, 2026

This test measures how quickly electrical signals travel along your median nerve, which runs from your arm to parts of your hand and fingers. It helps assess nerve health and identify issues like neuropathy or nerve damage.

Quick summary

["This test checks how well your nerves function, especially in the arm and hand area."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
98625-7
Short code
Sensory NC velocity R median n
Synonyms
Sensory NC velocity R median n
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
nerve-conduction
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your doctor may order this test if you have symptoms like tingling, numbness, weakness, or pain in your arm or hand. It can also be used to monitor nerve conditions, such as diabetic neuropathy, carpal tunnel syndrome, or other nerve-related disorders.

What to Expect During the Test

You’ll lie down while electrodes are placed on your arm and hand. A small electrical stimulus is briefly applied to measure how fast the signal travels. The process is painless and usually takes about 30 minutes.

Common Conditions Monitored

This test helps diagnose or track conditions like peripheral neuropathy, nerve compression (e.g., carpal tunnel), or other nerve disorders. It’s often used alongside other tests for a full evaluation.

How the Results Are Interpreted

Results compare your nerve conduction speed to expected values. Slower speeds may suggest nerve damage or disease, while normal speeds indicate healthy nerve function. Your doctor will discuss findings with you.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test plays a key role in diagnosing and managing nerve-related conditions by providing objective data on nerve function. It helps doctors determine the cause of symptoms, guide treatment, and monitor progress over time.

Short name

Sensory Nerve Conduction Velocity (median nerve)

Frequently asked questions

What causes nerve conduction velocity tests to be done?
Tests are typically ordered if you have symptoms like tingling, numbness, or weakness in your arms or hands, or if you have a known condition affecting nerves (e.g., diabetes, multiple sclerosis). Your doctor may also recommend it if you’ve had nerve damage from injury or exposure to toxins.
How long does the test take, and is it painful?
The test usually takes about 30 minutes. You may feel a mild tingling sensation when electrodes are placed, but the electrical stimulus is very brief and not painful. Most people find it comfortable.
Can I eat or drink before this test?
You can eat and drink normally before the test, as it doesn’t require fasting. However, avoid caffeine or nicotine for a few hours beforehand, as they may affect nerve responses.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy