EMG Testing
What is EMG Testing?
Electromyography (EMG) is a diagnostic procedure used to assess the health of muscles and the nerve cells that control them (motor neurons). Motor neurons transmit electrical signals that cause muscles to contract, and EMG measures these signals.
Why is EMG Done?
Doctors may recommend EMG if you have symptoms like:
Muscle weakness
Tingling or numbness
Muscle cramps or spasms
Unexplained pain in muscles
It helps diagnose conditions such as:
Neuropathy (e.g., carpal tunnel syndrome, diabetic neuropathy)
Radiculopathy (nerve root issues like sciatica)
Muscle disorders (e.g., muscular dystrophy)
Motor neuron diseases (e.g., ALS)
How Does EMG Work?
There are two main parts:
Nerve conduction study (NCS) – Small electrodes are placed on the skin to measure how well electrical signals travel through the nerves.
Needle EMG – A thin needle electrode is inserted into specific muscles to measure electrical activity at rest and during contraction.
What to Expect During the Test
You may feel a brief, mild electrical pulse during nerve testing.
The needle part may cause slight discomfort or soreness.
The test usually takes between 30 to 60 minutes.
No special preparation is needed, but you may be asked to avoid lotions or creams before the test.
Is EMG Safe?
Yes. EMG is a low-risk procedure. Some people may experience minor bruising or temporary muscle soreness afterward.