title: [Binaural summation of the ipsilateral and contralateral acoustic stapedius reflex (author's transl)].
abstract: The binaural summation of the simultaneous contra- and ipsilateral acoustic stapedius reflexes was examined in 20 normal-hearing patients. In these patients, the effect of summation was most pronounced with subthreshold intensities. A contralateral reflex was increased by ipsilateral intensities 8 db below threshold. A reflex could also be elicited by binaural intensities which were contra- and ipsilaterally 4 db below threshold. As a result of our studies, we recommend a revision of the definition of a positive Metz-recruitment. Because of possible binaural summation effects, the absolute value of the contralateral stapedius reflex threshold should not exceed 105 db HL in spite of possible sensorineural hearing loss.
mesh_terms: D000158:Acoustic Impedance Tests; D001309:Auditory Threshold / Q000502:physiology; D007839:Functional Laterality; D006801:Humans; D008144:Loudness Perception / Q000502:physiology; D009132:Muscles / Q000502:physiology*; D010898:Pitch Perception / Q000502:physiology; D012000:Recruitment Detection, Audiologic; D012022:Reflex, Acoustic; D013198:Stapedius / Q000502:physiology*; D009435:Synaptic Transmission
vernacular_title: Binaurale summation des ipsilateralen und kontralateralen akustischen stapediusreflexes.