Electromyogram (EMG) Test in San Jose
An Electromyogram (EMG) is a process involving the testing of the muscles and nerves in a patient's body if they have been feeling repeated pain. It is an in-office procedure that is carried out by a neurologist. The procedure involves the use of electrical signals to test the patient's nerves and muscles. It is not used as any form of treatment and is simply a process to diagnose the cause of patient's problems.
What is an EMG used to diagnose?
When a patient has trouble with their nerves or muscles, an EMG is very useful in getting to the root of the problem. Often the patient experiences different symptoms beginning with shooting pain in their neck, or it might also be the pain due to a pinched nerve, and in such cases, an EMG is very useful for them. It not only tests the patient's nerves but it also diagnoses the muscles in their extremities in order to find the problem afflicting the patients.
What kind of preparations should a patient take before an EMG?
The patient does not need to fast or curb their food intake before the procedure since there are no such requirements for the EMG. They must make the neurologist aware of the medications that they are consuming as well before the procedure begins. They also need to wear clothes that do not interfere with the procedure.
What is the procedure for an EMG?
- The patient is made to lie on an examination table, with the EMG placed machine beside them.
- Some patients might request for pain medication during this procedure. In most cases, the medication is not required.
- The first part of the EMG involves conducting brief electrical shocks through the patient's arm or leg. This method helps the physician to determine how fast the patient's nerves can conduct the electrical current. If the nerves conduct the electric current satisfactorily then it shows that they are in good health. If they are unable to act as a conductor for the current then it is indicative of a prevalent disease and this will help the doctor to treat the patient.
- The second part of the EMG involves the use of needles which are inserted into a relaxed muscle and then moved about slowly. The movement of the needles can be used to determine if there has been any damage to the patient's muscles. They also produce sound on the EMG monitor so as to help the neurologist decode the muscle activity in the patient's body.
- The nerve conduction test takes more time than the needles test due to the calculations and measurements needed to be made during it. The entire procedure does not take up a lot of time and it isn't a tedious process.
- The patient should receive the results of the test within a day depending upon the needs of the neurologist.
If you are in need of an EMG it is necessary to get in touch with a neurologist who can efficiently perform the procedure for you.
What is Nerve Conduction Study
A nerve conduction study (NCS), also called a nerve conduction velocity (NCV) test is a measurement of the speed of conduction of an electrical impulse through a nerve. NCS can determine nerve damage and destruction.
During the test, the nerve is stimulated, usually with surface electrode patches attached to the skin. Two electrodes are placed on the skin over the nerve. One electrode stimulates the nerve with a very mild electrical impulse and the other electrode records it. The resulting electrical activity is recorded by another electrode. This is repeated for each nerve being tested.
The nerve conduction velocity (speed) is the calculated by measuring the distance between electrodes and the time it takes for electrical impulses to travel between electrodes.
A related procedure that may be performed is electromyography (EMG). An EMG measures the electrical activity in muscles and is often performed at the same time as NCS. Both procedures help to detect the present location, and extent of diseases that damage the nerves and muscles.
Mohammed F. Ahmed, M.D. is a highly recommended neurologist and conducts EMG testing. Give us a call at 408-241-4210 to book an appointment!