What is an NCS/EMG?

 

When weakness, pain, or a change in sensation occurs along a nerve, an electromyogram - a nerve conduction study - may be performed to determine whether there is degeneration of the nerve or if pressure on the nerve is causing the symptoms.

 

How is the NCS Done?


A Board-Registered Technologist will perform your NCS test and instruct you during the test. You will be asked to rest comfortably and relax.  Recording electrodes will be placed on your skin, on a muscle or along a nerve pathway. A stimulator will deliver a brief electrical pulse and the response is recorded.  There is no residual effect and you will be able to resume normal daily activities after the test.

How is the EMG done?

 

A qualified physician will perform the EMG test. A very fine, sterile needle electrode is inserted into the muscle for a few seconds, and tells the doctor how the muscle is working. You may experience minor cramping during the test, but it should not be unbearable. The EMG is not an invasive procedure and will allow you to resume normal daily activities.

 

Preparation for an EMG:


1. Advise the technologist if you are taking a “blood-thinner” such as Coumadin.
2. Wash your skin and do not apply perfume or lotions.
3. Wear loose clothing.
4. Eating is permitted; however, avoid alcohol and caffeine prior to test.