Electroneuromyography, nerve conduction and electrical muscle stimulation examination
An ENMG is performed to study peripheral nerve and muscular function. It is used to diagnose conditions such as nerve damage, pinched nerve and other peripheral nerve disorders, and muscle diseases. It can also help determine the cause of symptoms such as numbness, tingling, altered sensation, pain, and muscle weakness.
Referral and duration
A doctor’s referral is required for the examination. The test is performed by a specialist in clinical neurophysiology and usually takes about 30–40 minutes.
Preparation
No special preparation is needed. However, it is important that the limbs being examined are warm during the test.
How the examination is performed
The examination usually consists of two parts. First, nerve function is assessed by delivering small electrical impulses to the skin. Second, muscle function is examined using a thin needle electrode inserted into the muscle.
Sensations during the examination
The electrical impulses and the needle examination may feel uncomfortable. A small bruise may sometimes develop at the needle insertion site, but it usually heals on its own.
Results
A clinical neurophysiology specialist will prepare a report of the examination. The report is also sent to the doctor who referred you.