title: A study of the electromyographic activity of the muscle orbicularis oris.
mesh_terms: D000200:Action Potentials; D000328:Adult; D004576:Electromyography; D005152:Facial Muscles / Q000502:physiology*; D006801:Humans; D008297:Male; D009055:Mouth / Q000502:physiology*; D013060:Speech / Q000502:physiology*