Laryngeal EMG (electromyogram)
Your doctor has ordered a Laryngeal EMG
(electromyogram) for you. An EMG is the
electrical study of your nerves and muscles.
This study helps your doctor to find the
cause of your symptoms and decide on the
best treatment for you. You do not have to
do anything special to prepare for the test. If
you have question about the EMG, be sure
to ask your doctor or nurse.
If you are taking a blood thinning medicine
please call us at (608) 263-7247.
Arriving for your EMG
Your EMG appointment is in the EMG lab,
J module/ 2nd floor. You must stop and
register 15 minutes before your scheduled
appointment. Registration is on the main
floor inside the clinic entrance on your right
hand side. After registration, continue on
'Main Street' through the H elevator lobby to
the J lobby. Please check in at the
Neurodiagnostics desk for your EMG.
What is a Laryngeal EMG?
You will be asked to lie on a bed with your
head back and slightly over the edge of a
ξ First, a small metal disc (about the
size of a fifty-cent piece) will be
taped to your skin.
ξ After cleaning the skin over your
voice box with alcohol, a thin
electrode will be inserted through the
skin into the muscle that controls
ξ The electrode looks like a needle, but
it is solid and not hollow.
ξ Most often, four muscles will be
tested, two on the left and two on the
right side of your voice box.
ξ During the exam, you will be asked
to make a sound like soft eees.
ξ You will hear a crackling speaker
sound that comes from our EMG
equipment. This is the electrical
activity from your muscles which
has been changed into sound waves.
ξ There are no electrical shocks during
any of this exam.
ξ The study is somewhat
uncomfortable because of the needle
ξ Care is taken to lessen any
discomfort. But, we cannot use
anesthetic medicines to reduce the
discomfort. They would interfere
with the EMG signal we get from
What this study tell my doctor
The signals tell us if you have a disease of
the nerves or the muscles that control your
voice box. Also, it tells us if the message
that the brain sends to your voice box is
The entire EMG takes about 15 minutes.
After the test, we will send the results to
Your health care team may have given you this information as part of your care. If so, please use it and call if you
have any questions. If this information was not given to you as part of your care, please check with your doctor. This
is not medical advice. This is not to be used for diagnosis or treatment of any medical condition. Because each
person’s health needs are different, you should talk with your doctor or others on your health care team when using
this information. If you have an emergency, please call 911. Copyright © 6/2016 University of Wisconsin Hospitals
and Clinics Authority. All rights reserved. Produced by the Department of Nursing. HF#6937