Electromyography (EMG)
EMG evaluates the electrical activity in your muscles during rest and movement. It helps detect:
● Muscle disorders
● Nerve damage
● Abnormal nerve-to-muscle signals
Nerve Conduction Velocity (NCV)
NCV measures how fast and strong electrical signals travel through your peripheral
nerves. It helps diagnose:
● Nerve compression (e.g., carpal tunnel syndrome)
● Peripheral neuropathy
● Nerve injuries or degenerative conditions
1. Improved Diagnostic Accuracy
EMG and NCV measure different aspects of your neuromuscular system. Used together, they:
● Differentiate between nerve root, nerve trunk, and muscle disorders
● Increase diagnostic confidence
● Reduce false negatives or missed diagnoses
For example: In patients with radiculopathy, NCV results may appear normal, but the EMG often shows clear abnormalities.
2. Guideline-Based Care
The AANEM recommends that EMG and NCV be performed together in the same visit, and interpreted in real time by a trained physician. According to their official guidelines:
“Nerve conduction studies performed without needle EMG have the potential to compromise patient care.”
3. Faster, More Targeted Treatment Plans
A complete electrodiagnostic evaluation:
● Helps your physician make a faster and more accurate diagnosis
● Prevents unnecessary imaging, medication, or surgery
● Leads to better outcomes and fewer delays
You may be referred for EMG/NCV testing if you have:
● Numbness, tingling, or burning sensations
● Muscle weakness or twitching
● Radiating pain down the arms or legs
● History of diabetes, disc problems, or nerve injuries
● Suspected conditions such as:
○ Carpal Tunnel Syndrome
○ Sciatica / Radiculopathy
○ Peripheral Neuropathy
○ Cervical or Lumbar Disc Disease
○ Motor neuron disorders
○ Myopathy or muscular dystrophies
If you’re experiencing symptoms such as numbness, pain, or weakness the combination of EMG and NCV testing may be the next step in getting the answers you need.
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