One is by the muscle showing activity while it is at rest.If the test was abnormal it will show up in two ways: Normal results mean that the muscle or muscles that were tested did not show electrical activity while at rest, also normal activity when the muscle was contracted. Once the test is completed, and the results are obtained it will show a normal or abnormal test.
The test itself usually lasts anywhere from 30-90 minutes. They may also ask you to change your position, depending on which muscles are injured. They will also determine how much activity the muscle has when slightly contracted.ĭuring this process, the examiner may ask you to contract or relax specific muscles.
They are used to determine if there is any muscle activity when the muscle is at rest. The needle electrodes may cause slight discomfort until they are removed. When the test is underway, the surface electrodes will transmit small electrical currents that may feel like a twitch or spasm. The waveforms can be read and measured by trained medical professionals. This activity is then transmitted to a monitor where it is displayed as waveforms. They can detect the electrical activity within the muscles and nerves. Both types of electrodes are used as microphones. With the needle electrodes, you will have some soreness after the test. This type of electrode is used to do the EMG test. The needle electrodes are small needles that are inserted into the muscle, similar to an injection. This type of electrode is used to do the NCV portion of the test.
The surface electrodes stick to the surface of the skin and do not cause pain. The electrodes will vary from surface electrodes to needle electrodes, depending on your symptoms.
Skin, depending on where you are having the symptoms. Just before the test, the doctor or technician will place electrodes on various locations on your What should I expect before and during the procedure?
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