EMG Test (Electromyography) - Muscle & Nerve Disorder Diagnosis | Dr. Satyan Nanda

The procedure is generally straightforward and is designed to assess how well your nerves communicate with your muscles. During the examination, small electrodes may be used to assess nerve and muscle responses, while a fine needle electrode may be inserted into selected muscles to record electrical activity.

An EMG does not simply look at whether a muscle is working. It can help determine whether abnormal muscle activity may be associated with a nerve problem, a disorder affecting the muscle itself, or another neuromuscular condition.

Your doctor will explain the procedure before it begins and guide you through each stage of the examination.

Electromyography (EMG) is a diagnostic procedure that measures the electrical activity of muscles. Healthy muscles produce characteristic electrical signals when they are at rest and when they contract. Changes in these signals can provide clues about the functioning of the muscles and the nerves supplying them.

An EMG Test is often used as a test for muscle and nerve disorders when symptoms cannot be explained through a clinical examination alone.

The test can help assess conditions involving:

• Peripheral nerves
• Individual muscles
• Nerve roots
• Neuromuscular connections
• Muscle weakness or abnormal muscle activity

An EMG may be performed together with nerve conduction studies (NCV/NCS). While nerve conduction studies primarily assess how electrical signals travel along nerves, EMG evaluates the electrical activity within muscles. When used together, these tests can provide a more complete picture of nerve and muscle function.

The exact procedure varies depending on your symptoms and the muscles or nerves that need to be evaluated.