Electromyography

Electromyographies (EMGs) and Nerve Conduction Studies (NCSs) stimulate muscle contractions that reveal which nerves are pinched. This helps to confirm the diagnosis and determine the seriousness of the condition. By isolating a specific area of nerve and muscle disorder, the physician can formulate the most effective treatment plan.
 
The first part of the process is the NCS. Dr. Tony Ton-That stimulates certain nerves by applying a brief electric stimulus to one portion of the nerve. The nerve stimulation causes a “tingling-like” sensation. Small electrodes are applied to the skin and recordings are made. The purpose of a nerve conduction study is to see if the nerves are conducting normally, at a slower speed, or not conducting at all.
 
The second part of electrodiagnosis is the needle EMG. Dr. Ton-That analyzes the motor activities in the muscle by inserting a fine needle into the selected group of muscles. During this testing he observes on his monitor the activity of the muscles at rest and during voluntary movement.
 
Preparation:
The time required to do the study varies, but generally takes between 30 and 60 minutes. There are no restrictions relative to the activities before or after testing, and there are no permanent after effects. Patients should not apply any lotion, cream or oily substance to the skin prior to testing.