electromyography

n. production and study of electromyograms (graphic records of the electrical activity of muscles)

Electromyography (EMG) is a technique for evaluating and recording physiologic properties of muscles at rest and while contracting. EMG is performed using an instrument called an electromyograph, to produce a record called an electromyogram. An electromyograph detects the electrical potential generated by muscle cells when these cells contract, and also when the cells are at rest.
See more at Wikipedia.org...

Electromyography is an electrical recording of muscle activity that aids in the diagnosis of neuromuscular disease. [more]Electromyography - Community and Resources

Noun
1. diagnosis of neuromuscular disorders with the use of an electromyograph
(hypernym) diagnostic procedure, diagnostic technique

a test used to detect nerve function. It measures the electrical activity generated by muscles.