elektromysiografia

Elektromyografia, often abbreviated as EMG, is a diagnostic technique used to evaluate the electrical activity produced by skeletal muscles. It is performed by inserting a needle electrode into the muscle to record this activity. The recorded signals are then displayed on a screen, allowing for the assessment of muscle health and nerve function.

EMG can help diagnose a variety of neuromuscular disorders, such as carpal tunnel syndrome, peripheral neuropathy, myasthenia gravis, and amyotrophic lateral sclerosis (ALS). It can also be used to assess the extent of muscle damage from injury or disease. During the procedure, the patient may be asked to contract or relax specific muscles to observe the electrical signals under different conditions.

The technique involves measuring the electrical potential of muscle fibers when they are stimulated, either by a nerve impulse or artificially. The amplitude and duration of these electrical signals, as well as their frequency, provide valuable information about the health and function of the muscles and the nerves that control them.

While EMG is generally considered safe, there is a small risk of bleeding or infection at the needle insertion site. Discomfort or pain can also occur during the procedure, which is usually mild and temporary. The results of an EMG test are typically interpreted in conjunction with other clinical findings and diagnostic tests.