Auditory Brainstem Implant: Electrophysiologic Responses and Subject Perception (original) (raw)

Ear and hearing, 2014

Abstract

The primary aim of this study was to compare the perceptual sensation produced by bipolar electrical stimulation of auditory brainstem implant (ABI) electrodes with the morphology of electrically evoked responses elicited by the same bipolar stimulus in the same unanesthetized, postsurgical state. Secondary aims were to (1) examine the relationships between sensations elicited by the bipolar stimulation used for evoked potential recording and the sensations elicited by the monopolar pulse-train stimulation used by the implant processor and (2) to examine the relationships between evoked potential morphology (elicited by bipolar stimulation) to the sensations elicited by monopolar stimulation. Electrically evoked early-latency and middle-latency responses to bipolar, biphasic low-rate pulses were recorded postoperatively in four adults with ABIs. Before recording, the perceptual sensations elicited by these bipolar stimuli were obtained and categorized as (1) auditory sensations only...

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