Doubles périodes de silence sur les muscles élérateurs de la mandibule chez l’homme: une étude électromyographique

This study is performed during a global E.M.G. on the elevators masseter and temporal muscles of the mandibule. 14 subjects out of a total of 81 present two successive silent periods following a single mechanical stimulation on the chin. The second, silent period occurs after a certain lagtime simular to the one observed by other research workers. The hypothesis of an etiology in the subjects occlusion or in a specificity of his masticatory function have been rejected. Various hypothesis are suggested by other research workers: - Response to a painful or to an electrical stimulation - A single silence period could be a weariness or dysfunctionnal symptom. - Different receptors or nervous pathway could be stimulated for both inhibition. The observation of two successive silent periods, for a single extern mechanical stimulation is an occasional fact and has no relationship with the subject’s occlusion.