title: Firing rate behavior of human motor units during isometric voluntary contraction: relation to unit size.
mesh_terms: D004576:Electromyography; D005071:Evoked Potentials; D005385:Fingers / Q000294:innervation; D006801:Humans; D007537:Isometric Contraction; D008297:Male; D009046:Motor Neurons / Q000502:physiology*; D009119:Muscle Contraction; D005082:Physical Exertion; D011999:Recruitment, Neurophysiological; D013569:Synapses / Q000502:physiology