Intermediate
Technical
IVT
electromyogram
Pronunciation: ih-lek-troh-MY-oh-gram
A diagnostic test that measures electrical activity in muscles and peripheral nerves.
Full Definition
An electromyogram (EMG) is a neurodiagnostic procedure that evaluates the electrical activity of skeletal muscles and the peripheral nerves that control them. The test involves inserting fine needle electrodes into muscles to record their electrical signals at rest and during voluntary contraction. EMG studies are crucial for diagnosing neuromuscular disorders, peripheral neuropathies, motor neuron diseases, and muscle disorders such as myositis or muscular dystrophy.
Usage
Usage note: Distinguished from EEG (brain) and ECG (heart) by the 'myo' prefix referring to muscle.
In Context
- "The electromyogram demonstrated denervation potentials in the affected muscle groups." — Neuromuscular consultation
- "Needle electromyogram findings were consistent with chronic axonal polyneuropathy." — Diagnostic study report
Also known as
EMG
Don't confuse with
electroencephalogram
electrocorticogram