Abstract
The Auditory brainstem responses (ABRs) of 606 ears were evaluated from 425 profoundly deaf patients. A potential with negative deflection was found at the latency 3msec in 48 ears of 37 patiants above the intensity of 80dBnHL. As intensity was increased, the amplitude was larger and latency decreased. The response reappered in retesting, and did not disappeared with masking contralateral ear to click stimulation.
We speculated the response to be the physiological potential evoked by acoustic stimulation, neither electrical artifact nor shadow response from the good ear, and we concluded the response is one type of ABR wavefrom recorded only in periherally profound deafness, since a few of low frequency threshold remained and none of central disorder wes found.
