Muscle and nerve testing helps diagnose damage and disease
Electromyography or EMG is a test of the responsiveness of your muscles to nerve signals. A nerve conduction study or NCS is a test to determine how quickly nerve impulses move throughout your nervous system. The tests are often performed together and may be recommended if you have any of the following in your arms, legs, back or another part of the body:
- Cramping
- Numbness
- Pain
- Tingling
- Weakness
The doctor may refer to EMG and NCS to diagnose conditions such as:
A person who has suffered a sports injury, for example, may need an EMG and NCS to determine where the symptoms are coming from and how to best treat the injury. A person who has experienced some kind of trauma to the body, like a car accident, may need this type of testing to further diagnose injury.
The doctor may also rely on NCS to diagnose diseases, such as muscular dystrophy and Guillain-Barré syndrome, or to see how well you’re recovering from a nerve injury.