title: Motor unit firing rate during static contraction indicated by the surface EMG power spectrum.
mesh_terms: D000293:Adolescent; D000328:Adult; D004576:Electromyography; D005152:Facial Muscles / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008410:Masticatory Muscles / Q000502:physiology*; D009046:Motor Neurons / Q000502:physiology*; D009119:Muscle Contraction