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    Université de Fribourg

    Increase in heterogeneity of biceps brachii activation during isometric submaximal fatiguing contractions: a multichannel surface EMG study

    Staudenmann, Didier ; Dieën, Jaap H. van ; Stegeman, Dick F. ; Enoka, Roger M.

    In: Journal of Neurophysiology, 2014, vol. 111, no. 5, p. 984–990

    The effects of fatigue emerge from the beginning of sustained submaximal contractions, as shown by an increase in the amplitude of the surface electromyogram (EMG). The increase in EMG amplitude is attributed to an augmentation of the excitatory drive to the motor neuron pool that, more importantly than increasing discharge rates, recruits additional motor units for the contraction. The aim of...