Palatal Myoclonus and Diphenylhydantoin Therapy

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Abstract
To the Editor: The report by Phillips and Eldridge (N Engl J Med 289:1390–1395, 1973) of a favorable response of respiratory myoclonus to diphenylhydantoin is most interesting. However, although we are inclined to agree that respiratory myoclonus or diaphragmatic flutter may be of central origin, we question whether or not the clinical presentation of their case should really be considered "similar" to that of palatal myoclonus.Unlike diaphragmatic flutter, palatal myoclonus is usually rhythmical and persists during sleep as well as in the wakeful state, and does not occur paroxysmally or in a recurrent fashion.1 2 3 Furthermore, the response of their . . .

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