electroneuromyography

Electroneuromyography (ENMG) is a diagnostic technique that measures the electrical activity of muscles using specialized electrodes called sensors. These sensors, usually electrodes attached to the skin, detect the electrical signals generated by muscle contractions. ENMG is often used in conjunction with electromyography (EMG), a similar technique that measures the electrical activity of muscles, but specifically focuses on the motor unit activity.

ENMG measures the muscle response, primarily the twitch response, to electrical stimulation, such as when a technician sends an electrical impulse to a muscle to observe its contractions. This information is then used to assess muscle function, particularly in patients with muscle or nerve disorders. ENMG is particularly useful in assessing the potential for voluntary muscle contractions in patients who have been paralyzed or have reduced muscle function.

Common indications for ENMG include diagnosing and managing amyotrophic lateral sclerosis (ALS), myasthenia gravis, peripheral neuropathies, and other neuromuscular disorders. ENMG may also be used to assess muscle function following surgical procedures, which can impact muscle function.

While EMG measures the electrical activity of muscles at rest, ENMG assesses the contractile response of muscles to an electrical stimulus. Both techniques provide valuable information about muscle function and can aid in diagnosis. However, the specific benefits and uses of ENMG should be determined by medical professionals on a case-by-case basis. The technique has its own set of limitations, and a comprehensive clinical examination can provide more complete information.