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Diagnosis of disease states by recording the spontaneous electrical activity of tissue or organs, or by the response to stimulation of electrically excitable tissue.



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.

References in periodicals archive ?
Hodach has a PhD in Pathology and an MD with board certification in neurology and electrodiagnosis, as well as a master's degree in public health.
16) reported that UNEE was identified in 105 out of 148 computer keyboard operators, referred for electrodiagnosis due to clinical suspicion of focal upper limp neuropathies.
Examination of median and ulnar latencies in the same extremity and median and ulnar latencies in opposite extremities has been shown to assist in early electrodiagnosis of CTS.
Ultrasound evaluation of focal neuropathies; correlation with electrodiagnosis.
Jaggy has brought together in an organized and consistent manner a remarkably in-depth treatment outstanding for its coverage of neurological examination, principles of investigation, neuroimaging, neurosurgery, neurophamacology, electrodiagnosis, and MRI based neuroanatomy--as well as coverage of clinical aspects, each structure of the nervous system in turn.
PM&R" will be published monthly and is designed to carry clinical, evidence-based research and review information that will impact the specialty of physical medicine and rehabilitation, Elsevier said, and includes coverage of acute and chronic musculoskeletal disorders and pain, neurologic conditions involving the central and peripheral nervous systems, rehabilitation of impairments associated with disabilities in adults and children, and neurophysiology and electrodiagnosis.
Electrodiagnosis in spinal cord injured persons with new weakness or sensory loss: Central and peripheral etiologies.
In its "golden years" before MRI, electrodiagnosis was a good procedure for detecting radiculopathy, with best results obtained on lean, young patients who had acute symptoms, good pain tolerance, and no prior neck or back surgery.
Readability Statistics for Brochures Fog Index Flesch-Kincaid Title Grade Level Grade Level What Is Electrodiagnosis 15 12 Facts About MDA 13 11 Facts About Charcot Marie Tooth Disease 15 12 Facts About Spinal Muscular Atrophy 15 11 Facts About Amyotrophic Lateral Sclerosis 15 12 Facts About Myasthenia Gravis 12 10 Title SAM Score * What Is Electrodiagnosis 43% * Facts About MDA 50% * Facts About Charcot Marie Tooth Disease 52% * Facts About Spinal Muscular Atrophy 50% * Facts About Amyotrophic Lateral Sclerosis 53% * Facts About Myasthenia Gravis 50% ([dagger]) * 70%-100% superior, 40%-69% adequate, 0%-39% not suitable ([dagger]) In 2001, a new myasthenia brochure was created and sent to all members of the American Association of Neuroscience Nurses in the United States and Canada.
Anesthesiologists should have knowledge of various diagnostic evaluations, including diagnostic neural blockades, imaging modalities, pharmacodiagnosis, electrodiagnosis, and laboratory studies.