Library · Test
Electromyography
Make it clearer
Electromyography is the test that measures a muscle's electrical signals, and it measures them at two separate moments: when the muscle is at rest, and when it is being used.
Those signals are picked up with a needle electrode, a very thin needle placed in the muscle that works like a microphone: from inside the muscle it records the electrical activity while the person moves that muscle and then relaxes it. So what the test gives back is not a snapshot of one instant but a recording of that activity in both situations, moving and still.
In brief
Electromyography measures the electrical signals a muscle produces at rest and while it is being used.
During electromyography, a small needle electrode placed in the muscle records its electrical activity while the person moves and relaxes that muscle.
Sources (1)
- MedlinePlus, National Library of MedicineElectromyography (EMG) and Nerve Conduction StudiesPublished
This page explains the topic in general terms; it does not tell anyone what treatment to follow.
Updated