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KMID : 1235920120040020047
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Medical Journal of Catholoc University of Daegu
2012 Volume.4 No. 2 p.47 ~ p.55
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Clinical Understanding of Electrodiagnostic Studies in Neuromuscular Diseases
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Lee Dong-Kuck
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Abstract
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Electrodiagnostic studies can be a valuable tool in the diagnosis and follow-up of neuromuscular disease. They must
be used not as routine tests but as an extension of the clinical evaluation. After the physicians decides what kinds of
pathophysiology could explain the patient’s signs and symptoms, they are then in a position to request specific
electromyography (EMG) studies to shed light on diseases that could affect the anterior horn cells, nerve roots,
peripheral nerves, neuromuscular junctions, or muscles.
It is important to recognize the inherent limitations of the EMG study. First, the kinds of tests and the muscles or nerves to be tested must be determined by clinical findings. There is no routine or standard test in the EMG laboratory. Then, the EMG findings must be interpreted in light of the clinical findings because no EMG results are pathognomonic of a specific disease entity. For these reasons, it is essential that the clinical problem be assessed thoroughly and that a careful neurological examination be performed before the electrophysiological study. Three types of tests are performed in the majority of EMG laboratories: the nerve conduction study, the needle EMG study, and the repetitive nerve stimulation test.
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KEYWORD
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Electrodiagnostic studies, Nerve conduction study, Needle EMG study
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