Detection radius of EMG for fasciculations: empiric study combining ultrasonography and electromyography

Fasciculation potentials are defined by spontaneous activity derived from one whole single motor unit or from part of it (Denny-Brown and Pennybacker 1938; Trojaborg and Buchthal 1965). The same fasciculations potentials may appear repetitively in the same location of a muscle. Occurring at a low intensity in most people, they may also present in "benign fasciculation syndrome" or as a symptom of a wide range of other types of motor neuron lesion (Scheel et al. 1997; Fermont et al. 2010; de Carvalho et al.

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