Electrodiagnosis

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electrodiagnosis

[i¦lek·trō‚dī·əg′nō·səs]
(medicine)
Diagnosis of disease states by recording the spontaneous electrical activity of tissue or organs, or by the response to stimulation of electrically excitable tissue.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Electrodiagnosis

 

a method of investigating the conductivity of motor nerves and the excitability of muscles by stimulation with an electric current. Electrodiagnosis is used to detect diseases or injuries to peripheral nerves and muscles. Both alternating and direct current are used.

There are certain points on the surface of the body that correspond to the most electrically excitable points on each nerve and muscle. An active electrode in the form of a rod is attached to these points, and a passive electrode in the form of a wide lead plate is placed on the sternum or lower back. The threshold of excitability is determined from the minimum current intensity capable of inducing visible muscle contraction first on the healthy side and then on the affected side; quantitative changes are subsequently noted. The absence of a muscle reaction to strong stimulation implies that the nerve or muscle is dead. Nerve regeneration after an injury is judged from the restoration of excitability.

Electrodiagnosis permits early detection of tetanus, myasthenia, myotonia, and other diseases. Chronaximetry is a means of electrodiagnosis whereby the electroconductivity of tissues is measured, taking into account the type and duration of current needed to evoke a response. In poliomyelitis, for example, considerable time is required to provoke a muscle response to stimulation. Electrodiagnosis is also used to diagnose some ear, eye, and internal disorders.

Electro-odontodiagnosis is a method of examining sensory nerves of teeth by stimulating them with an electric current. It is used in dentistry to diagnose painful changes in the pulp or periodontium.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
An electroneuromyography test was performed by the same professional, neurologist and neurophysiologist with over 20 years of clinical experience in the area.
In descending order, the prevalence of leprosy neuropathy in nerves evaluated with electroneuromyography were: ulnar with 67 (40.3%) cases, fibular with 51 (30.7%) cases, sural with 50 (30.1%) cases, posterior tibial with 45 (27.1%) cases, median with 38 (22.8%) cases, radial with 13 (7.8%) cases, and saphenous with 13 (7.8%) cases.
The agreement values specified for nerves between the neurological clinical examination and electroneuromyography are shown in Table 4.
The overall agreement between the monofilaments test (sensory function) and electroneuromyography for the diagnosis of leprosy neuropathy is presented in Table 5.
The overall agreement between the voluntary muscle test (motor function) and electroneuromyography for the diagnosis of leprosy neuropathy is presented in Table 6.
electroneuromyography) in the diagnosis of neuropathy, the results is even more evident.
Recent evidence is trying to correlate ultrasound with electroneuromyography in a noninvasive attempt to assess the function of peripheral nerves.
Therefore, the clinical examinations of monofilaments and voluntary manual muscle tests are able to reflect the general peripheral nerve function at a given point in time, but in comparison with electroneuromyography, clinical tests underestimate the extent of damage and detect injury too late.
Conclusion: Off-label use of Electroneuromyography may be reduced by using electroneurophysiological laboratory rotation as well as adequate and comprehensive clinical evaluation of patients.
Electroneuromyography (ENMG) is an essential method for evaluation of the anterior horn cells, peripheral nervous system, neuromuscular junctions and the neurophysiological state of muscles.
Keywords: Electroneuromyography, Children, Neuromuscular diseases, Diagnostic value.
Electroneuromyography (ENMG) is an electrophysiological method of examination for neurophysiological state of motor neuron, peripheral nerve and muscle functions.