1. The recording of electrical activity generated in muscles for diagnostic purposes; both surface and needle recording electrodes can be used, although characteristically the latter is employed, so that the procedure is also called needle electrode examination.
2. An umbrella term for the entire electrodiagnostic study performed in the EMG laboratory, including not only the needle electrode examination, but also the nerve conduction studies.
3. A diagnostic procedure in which metal probes are attached to or inserted into the skin in order to detect the electrical activity of contracting muscles.

Such activities are altered in recognizable ways by diseases that affect either muscles or nerves which supply the muscles.

4. The preparation, study of, and interpretation of electromyograms.
5. The recording of electrical activities associated with muscular functions, often used in the clinical diagnosis of muscular disorders.

A single electrical spike potential is generated when a muscle fiber contracts while the magnitude of the spike potentials is roughly proportional to the amount of muscular tension.

Surface detecting electrodes (for many muscle fibers) or needle electrodes (for one or a few fibers) provide a signal that is amplified and displayed on a cathode-ray tube.

An electrodiagnostic test performed to evaluate the neuromuscular function of the urinary or anal sphincter (circular muscle that constricts a passage or closes a natural opening).

It is done most often in patients with urinary or fecal incontinence.

1. The study by microelectrode recording of the electrical activity of individual muscle fibers.
2. A test used to evaluate the activity of single fibers of selected muscles; for example, common extensor of fingers, displayed as an action potential on an cathode-ray oscilloscope; SF-EMG may detect early defects in neuromuscular junction diseases; such as, myasthenia gravis, Eaton-Lambert syndrome, or botulism.

The recordings of the various electrical currents during contractions of the ureter.