Single fiber EMG evaluation in denervation and reinnervation

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Abstract
SFEMG can be used o follow the course of reinnervation. The parameters of fiber density, mean jitter and percent blocking must each be followed and related to the type of injury to determine the stage of reinnervation. The few reported cases in the literature of SFEMG recordings followed over time after nerve compromise are reviewed and an additional case is presented by the author. Mean jitter values can return to normal approximately 1½ years postonset of reinnervation. Some individual recordings may remain abnormal permanently.