Nerve Conduction Study (NCS)
A Nerve Conduction Study (NCS) is a noninvasive diagnostic test used to evaluate how quickly and effectively electrical signals move through your peripheral nerves. Often performed alongside Electromyography (EMG), this test helps healthcare professionals identify nerve damage or dysfunction. NCS is particularly helpful in diagnosing conditions that affect the body’s peripheral nervous system.
What is an NCS Study?
NCS measures the speed and strength of electrical impulses as they travel along a nerve. It is performed by placing small surface electrodes on the skin, usually over muscles and nerves. A gentle electrical stimulus is applied to one part of the nerve, and the resulting signal is recorded at another site to evaluate how efficiently the nerve is functioning.
What Can an NCS Diagnose?
NCS is commonly ordered when patients present symptoms such as:
- Tingling or numbness in the hands or feet
- Muscle weakness
- Burning or stabbing pain
- Delayed reflexes or loss of coordination
It helps in the diagnosis of:
- Carpal tunnel syndrome
- Peripheral neuropathy (including diabetic neuropathy)
- Sciatic nerve injury or radiculopathy
- Guillain-Barré syndrome
- Nerve compression syndromes
How is an NCS Performed?
At Capitol Imaging Services, NCS studies are conducted by trained specialists using advanced neurodiagnostic equipment. During the test:
- You will be comfortably positioned on an exam table.
- The technologist will place adhesive electrodes on your skin over nerves and muscles being tested.
- A low-level electrical impulse is delivered to stimulate the nerve.
- The response is recorded to assess the speed and strength of the nerve signal.
The process is repeated on multiple nerve pathways to gather a comprehensive profile.
What Will the Patient Experience?
Most patients describe the sensation as a mild tingling or tapping—similar to a static shock. While slightly uncomfortable, the impulses are brief and well-tolerated. The procedure is safe, involves no needles, and requires no recovery time. There are no restrictions following the test, and patients can resume normal activities immediately.
How Long Does an NCS Take?
Depending on how many nerves are being evaluated, an NCS typically takes between 20 and 60 minutes. Your provider will give you an estimate based on your symptoms and the areas being tested.
Have Questions? We Have Answers!
Capitol Imaging Services proudly offers Nerve Conduction Studies at select locations. Our skilled technologists and interpreting physicians are dedicated to providing accurate results and compassionate care.
To learn more or to find the nearest CIS center that performs NCS testing, contact us today. We’re here to help with scheduling and answer any questions you may have.
