Elemental mercury poisoning probably causes cortical myoclonus
Movement Disorders2007Vol. 22(13), pp. 1964–1968
Citations Over Time
Mona Ragothaman, Girish Baburao Kulkarni, Valappil V. Ashraf, Pramod Kumar Pal, Yasha T. Chickabasavaiah, Susarla Krishna Shankar, Srikanth Subbamma Govindappa, Parthasarthy Satishchandra, Uday B. Muthane
Abstract
Mercury toxicity causes postural tremors, commonly referred to as "mercurial tremors," and cerebellar dysfunction. A 23-year woman, 2 years after injecting herself with elemental mercury developed disabling generalized myoclonus and ataxia. Electrophysiological studies confirmed the myoclonus was probably of cortical origin. Her deficits progressed over 2 years and improved after subcutaneous mercury deposits at the injection site were surgically cleared. Myoclonus of cortical origin has never been described in mercury poisoning. It is important to ask patients presenting with jerks about exposure to elemental mercury even if they have a progressive illness, as it is a potentially reversible condition as in our patient.
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