We only perform this examination if it is required from a neurological perspective. The functions of muscle and nerve cells are checked using a thin needle electrode. Since the needle is inserted into the muscle, some people find this unpleasant. Unfortunately, we cannot perform this examination on patients with coagulation disorders or those undergoing treatment with blood-thinning medication.
EMG (Electromyography)
Description of the examination
Electromyography (EMG) is a procedure for measuring the electrical activity of your muscles. Using a fine needle electrode, the signals are recorded directly in the muscle and then evaluated. This makes it possible to find out whether and in what form there is a disturbance in the interaction of nerves and muscles. The data obtained provide information about muscle activity, possible inflammation, or degenerative processes.
During the examination, you lie or sit relaxed while the doctor carefully inserts the needle electrode into the affected muscle. The result is then displayed on a screen and can be analyzed in real time. In addition to the graphic display, you will sometimes hear the muscle activity as a crackling noise, which can be helpful in making a diagnosis.
When is this examination necessary?
An EMG is performed if there is a suspicion of neurological or muscular diseases. These include, for example, polyneuropathies, muscular dystrophies, or diseases such as ALS (amyotrophic lateral sclerosis). An EMG can also provide clarity if chronic back pain is suspected to be due to nerve irritation.
In addition, EMG is used to clarify muscle weakness, twitching, or unclear paresthesia in the arms and legs. The examination enables a precise diagnosis, which is of great importance for successful therapy planning.
Is this examination painful or uncomfortable?
Since a thin needle electrode is inserted into the muscle during the EMG examination, a brief prick may be noticeable. Some people find this unpleasant, while others only feel a slight pressure. However, most people cope well with the procedure.
In the case of coagulation disorders or if you are taking blood-thinning medication, an EMG is generally not performed to avoid complications. Your treating doctor will discuss with you in advance whether alternatives can be considered.