Concentric or Monopolar Electrode for Jitter Determination in Orbicularis Oculi

Single fiber electromyography (SFEMG), developed by Ekstedt and Stålberg in the 1960s, is the best-recognized technique for the study of motor unit microphysiology, including the neuromuscular jitter, the propagation velocity along individual muscle fibers, and muscle fiber organization within single motor units (Ekstedt, 1964; Stålberg and Ekstedt, 1968; Sanders and Stålberg, 1996). Jitter is a measure of the time variability of single muscle fibre depolarization in a motor unit, due to temporal variability at the neuromuscular junction during successive discharges.

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