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PubMed · 1565112

Technical artifact simulating "motor axonopathy".

J M Gilchrist·E Dosremedios·G Johnson·J Tornabene
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Abstract

We describe 3 patients, referred for other problems, whose nerve conduction studies revealed low compound motor amplitudes, normal motor conduction velocities and normal sensory nerve studies, consistent with a motor axonopathy. EMG was normal. The unexpected nature of these findings precipitated a search for technical artifact. A partial transection of the active electrode was found. After replacement, repetition of the motor studies was normal. Our explanation was of a normal "reference" signal being subtracted from a present but diminished "active" signal.

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ArtifactsAxonsElectrodesElectromyographyEquipment FailureFemaleHumansMaleNeural ConductionNeuromuscular DiseasesPeripheral NervesJournal Article

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J M Gilchrist, E Dosremedios, G Johnson, J Tornabene. 1992. Technical artifact simulating "motor axonopathy".. https://doi.org/10.1002/mus.880150403

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