Electromyography, commonly referred to as an "EMG", is a non-invasive test to diagnose many neurological conditions. It is performed by both neurologists and physiatrists. The first part of the test involves Nerve Conduction Studies, whereby surface electrodes are placed on a patient's skin on either the legs or arms, and a mild electrical current is applied to the skin. This stimulates the nerves and one is able to measure the integrity of the nerves, such as conduction velocity. The second part of the test, the EMG, involves gentle needle sampling (similar to an accupuncture needle) of different muscle groups in the arms and legs to assess whether there is a reduction of nerve supply or communication to that muscle. Electromyography allows a clinician to determine whether a nerve injury is acute or chronic, mild or severe. In addition, one can identify the location of the nerve insult. For example, this test is commonly used to diagnose conditions such as carpal tunnel syndrome, radiculopathies (commonly referred to as sciatica or a "pinched nerve"), multiple sclerosis, ALS as well as many other neurological conditions.

Electromyography Specialists