Electromyography (EMG) is a diagnostic procedure used to assess the health of muscles and the nerves controlling them. It’s often performed to evaluate muscle and nerve function and to diagnose conditions that affect these systems.
During an EMG, small electrodes are placed on or inserted into the muscles being tested. These electrodes detect and record the electrical activity produced by the muscles at rest and during contraction. Additionally, a nerve conduction study (NCS) may be performed alongside EMG to assess the function of the nerves supplying those muscles.
The recorded electrical signals provide valuable information about muscle and nerve function. Abnormal patterns of electrical activity can indicate a variety of conditions, including nerve damage, muscle disorders, motor neuron diseases, and other neuromuscular disorders.
EMG is commonly used to diagnose conditions such as carpal tunnel syndrome, peripheral neuropathy, myasthenia gravis, and amyotrophic lateral sclerosis (ALS), among others. It can help differentiate between nerve disorders, muscle disorders, and disorders affecting the junction between nerves and muscles.
EMG is generally safe, but it may cause some discomfort or minor bruising at the electrode insertion sites. However, these side effects are usually temporary. Overall, EMG is a valuable tool for diagnosing and monitoring neuromuscular conditions, helping healthcare providers develop effective treatment plans for their patients.
