Application of nerve and muscle tape

Nerve conduction study and electromyography (NCS/EMG) is a method for diagnosing the health of muscles and the nerve cells that control them. This method helps detect disorders in muscle and nerve function, as well as problems with nerve signal transmission from nerves to muscles.
NCS/EMG is performed professionally at the Iran Rheumatology Center using the most advanced equipment and experienced physicians.

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Nerve min ۱

Application of NCS/EMG in Diagnosing Nerve Damage Caused by Lupus

Nerve conduction study and electromyography (Electromyography and Nerve Conduction Studies) are important diagnostic tools for assessing nerve damage caused by lupus. In lupus, an autoimmune disease, neurological involvement can manifest as peripheral neuropathy, mononeuritis multiplex, or polyneuropathy. These tests, by measuring nerve conduction velocity (NCV) and muscle electrical activity (EMG), help differentiate between axonal and demyelinating damage.

Decreased nerve conduction velocity or reduced amplitude of action potentials may indicate demyelination or axonal loss, while EMG findings such as spontaneous activity (fibrillations) can confirm acute nerve injury. These methods are also useful in ruling out other causes, such as mechanical nerve compression or muscle diseases independent of lupus. By integrating NCS/EMG results with clinical symptoms and serological tests, physicians can provide a more accurate diagnosis of lupus-associated neuropathy and select more targeted treatment options.

Frequently asked questions about the nerve and muscle fascia

This test is a set of examinations that assess the health of nerves and muscles. It is used to diagnose problems such as carpal tunnel syndrome, nerve injuries (e.g., in diabetes), muscle inflammation, or neuromuscular diseases. It consists of two main parts:

  • Nerve Conduction Study (NCS): Measures the speed and strength of nerve signals.
  • Electromyography (EMG): Analyzes electrical activity in muscles at rest and during contraction.

You may feel some discomfort during the test, for example, when electrical current is passed during the NCS part or when the fine needle is inserted during the needle EMG part. However, this discomfort is usually short-lived and tolerable. The doctor or technician will explain the steps before the test to reduce patient anxiety.

  • Skin must be clean and free of creams or lotions.
  • Wear loose clothing to allow easy access to the areas being examined.
  • If you are taking blood-thinning medication or have a pacemaker, be sure to inform your doctor before the test.
  • Fasting is not required, but avoid consuming caffeine before the test.

This test is generally safe. After the needle EMG, you might experience slight bruising or local pain at the needle site, which usually resolves within 1 to 2 days. Severe infection or bleeding is very rare.

The test itself usually takes between 30 minutes and 1 hour. Preliminary results may be explained immediately by the doctor, but a more detailed analysis can sometimes take a few days (depending on the complexity of the problem).

A normal result does not necessarily mean there is no problem. Some diseases may not be detectable by this test in their early stages, or the problem may have another origin (e.g., spinal issues). The doctor will interpret the results along with your symptoms and other tests (such as MRI).

Yes, but the child’s cooperation is very important. In some cases, mild sedation techniques may be used to reduce stress. The test should be performed by a pediatric neurologist.

MRI shows the internal structures of the body (such as spinal discs or tumors). However, NCS/EMG examines the function of nerves and muscles (e.g., nerve damage due to compression or inflammation). These two tests are complementary, and sometimes both are necessary for a more accurate diagnosis.

Studies have shown this test is safe during pregnancy, but it is usually only prescribed in essential cases (e.g., severe muscle weakness). Be sure to inform your doctor of your pregnancy before the test.

  • Short rest.
  • If needles were used (EMG), avoid applying heat or massaging the area.
  • If you experience increased pain, redness, or fever, contact your doctor immediately.