What is the role of electrophysiologic studies in the workup of mercury toxicity?

Updated: Nov 05, 2018
  • Author: David A Olson, MD; Chief Editor: Tarakad S Ramachandran, MBBS, MBA, MPH, FAAN, FACP, FAHA, FRCP, FRCPC, FRS, LRCP, MRCP, MRCS  more...
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Answer

Electrophysiologic studies have demonstrated sensorimotor neuropathy, typically axonal, in some workers exposed to elemental mercury or mercury vapors. Workers with remote exposures, however, have exhibited only minimal conduction velocity slowing. [88] Abnormalities have also been documented in visual-evoked potential studies among workers exposed to mercury vapors. [76]

In the Faroe Islands, intrauterine methylmercury exposure (as determined by maternal hair and cord blood measures) was positively correlated with prolonged brainstem evoked potentials (III and V latency peaks) 14 years after initial exposure. [89]


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