title: Investigation of the mastoid electrode contribution to the brain stem auditory evoked response.
abstract: The auditory nerve and bran stem responses recorded at the vertex and mastoids were closely examined in normal subjects using a larynx electrode as a neutral reference point. With monaural stimulation, significant activity was found at the vertex and both mastoids, and the wave-forms at the ipsi- and contralateral mastoids were consistently different. With binaural stimulation the small amplitude mastoid response were largely in phase with the vertex response. The implications of the findings are discussed.
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001304:Auditory Diseases, Central / Q000175:diagnosis; D001933:Brain Stem / Q000502:physiology*; D003391:Cranial Nerves / Q000502:physiology; D004423:Ear / Q000502:physiology; D004566:Electrodes; D005072:Evoked Potentials, Auditory; D005260:Female; D006801:Humans; D007823:Laryngeal Nerves / Q000502:physiology; D008297:Male; D008416:Mastoid / Q000502:physiology*; D008875:Middle Aged; D009431:Neural Conduction; D000159:Vestibulocochlear Nerve / Q000502:physiology