 |
|
EMG
(Electromyogram)
The EMG studies the condition of the nerve roots leaving the spine and running
to the extremities. EMG works by examining the electrical activity in the muscles
which these nerve roots control. For example, if you are feeling lower back
pain, your leg muscles may be tested to see if there is a problem with the
nerves that travel to your legs.
During an EMG, tiny electrode
needles are inserted into the muscles being tested. The electrical
activity of the muscles is examined during both rest and contraction,
and the electrical activity in the muscle is amplified, displayed
and recorded for analysis. If the muscle is not functioning
normally, it may mean that a nerve is being irritated or pinched—a
possible sign of a herniated disc or spinal
stenosis.
The test takes anywhere from 30
minutes to an hour, depending on the number of muscles being
tested. The EMG is safe, but the needles may cause some bruising.
|
 |