myotonic discharge

myotonic discharge
high frequency repetitive discharges seen in myotonia and evoked by insertion of a needle electrode, percussion of a muscle, or stimulation of a muscle or its motor nerve; characterized by waxing and waning of frequency and amplitude. There are two types: one with biphasic spike potentials resembling fibrillation potentials and one with waves resembling positive sharp waves.

Medical dictionary. 2011.

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