Originally Posted by bonesey
hi and thanks for replies,but can you tell me what an EMG test entails
under anasthetic or awake?
What actually happens?
what do they use?
anything relavant as ive never heard of them in england although hopfully we have lots
The EMG and NCV testing is done while you are awake.....
Electromyography (EMG) is a test that measures muscle response to nervous stimulation (electrical activity within muscle fibers).
For an EMG, a needle electrode is inserted through the skin into the muscle. The electrical activity detected by this electrode is displayed on an oscilloscope (and may be displayed audibly through a speaker).
Because skeletal muscles are isolated and often large units, each electrode gives only an average picture of the activity of the selected muscle. Several electrodes may need to be placed at various locations to obtain an accurate study.
After placement of the electrode(s), you may be asked to contract the muscle (for example, by bending your arm). The presence, size, and shape of the wave form -- the action potential -- produced on the oscilloscope provide information about the ability of the muscle to respond when the nerves are stimulated.
Each muscle fiber that contracts will produce an action potential, and the size of the muscle fiber affects the rate (frequency) and size (amplitude) of the action potentials.
An EMG can be quite painful as well....
A nerve conduction velocity test is often done at the same time as an EMG.
A nerve conduction velocity test (NCV), is an electrical test that is used to detect nerve conditions. In this test, the nerve is electrically stimulated while a second electrode detects the electrical impulse 'down stream' from the first. This is usually done with surface patch electrodes (they are similar to those used for an electrocardiogram) that are placed on the skin over the nerve at various locations. One electrode stimulates the nerve with a very mild electrical impulse. The resulting electrical activity is recorded by the other electrodes. The distance between electrodes and the time it takes for electrical impulses to travel between electrodes are used to calculate the speed of impulse transmission (nerve conduction velocity). A decreased speed of transmission indicates nerve disease. A nerve conduction velocity test is often done at the same time as an electromyogram (EMG) in order to exclude or detect muscle conditions.
The NCV test can be used to detect true nerve disorders (such as neuropathy) or conditions whereby muscles are affected by nerve injury (such as carpal tunnel syndrome). Normal body temperature must be maintained for the NCV test, because low body temperatures slow nerve conduction.
You may just want to mention it to your doctor and see what they tell you... as far as whether they do the EMG's there or not....
Good Luck to you... Hope this helped....