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The Physiological Basis and Clinical Use of the Binaural Interaction Component of the Auditory Brainstem Response

Laumen, Geneviève; Ferber, Alexander T.; Klump, Georg M.; Tollin, Daniel J.

doi: 10.1097/AUD.0000000000000301
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The auditory brainstem response (ABR) is a sound-evoked noninvasively measured electrical potential representing the sum of neuronal activity in the auditory brainstem and midbrain. ABR peak amplitudes and latencies are widely used in human and animal auditory research and for clinical screening. The binaural interaction component (BIC) of the ABR stands for the difference between the sum of the monaural ABRs and the ABR obtained with binaural stimulation. The BIC comprises a series of distinct waves, the largest of which (DN1) has been used for evaluating binaural hearing in both normal hearing and hearing-impaired listeners. Based on data from animal and human studies, the authors discuss the possible anatomical and physiological bases of the BIC (DN1 in particular). The effects of electrode placement and stimulus characteristics on the binaurally evoked ABR are evaluated. The authors review how interaural time and intensity differences affect the BIC and, analyzing these dependencies, draw conclusion about the mechanism underlying the generation of the BIC. Finally, the utility of the BIC for clinical diagnoses are summarized.

The auditory brainstem response (ABR) and its binaural interaction component (BIC) represent the neuronal activity in the auditory brainstem and midbrain. Based on data from animal and human studies, we discuss the possible anatomical and physiological bases of the BIC. The effects of electrode placement and stimulus characteristics on the binaurally evoked ABR are evaluated. We review how inter-aural time and intensity differences affect the BIC and, analyzing these dependencies, draw conclusion about the mechanism underlying the generation of the BIC. Finally, the utility of the BIC for clinical diagnoses of binaural hearing are summarized.

1Cluster of Excellence Hearing4all, Animal Physiology and Behavior Group, Department for Neuroscience, School of Medicine and Health Sciences, Oldenburg University, Oldenburg, Germany; 2Neuroscience Program, University of Colorado Anschutz Medical Campus—School of Medicine, Aurora, Colorado, USA; 3Medical Scientist Training Program, University of Colorado Anschutz Medical Campus—School of Medicine, Aurora, Colorado, USA; 4Department of Physiology and Biophysics, University of Colorado Anschutz Medical Campus—School of Medicine, Aurora, Colorado, USA; and 5Department of Otolaryngology, University of Colorado Anschutz Medical Campus—School of Medicine, Aurora, Colorado, USA.

The authors have no conflicts of interest to disclose.

Address for correspondence: Georg M. Klump, Cluster of Excellence Hearing4all, Animal Physiology and Behavior Group, Department for Neuroscience, School of Medicine and Health Sciences, Oldenburg University, 26111 Oldenburg, Germany. E-mail: georg.klump@uni-oldenburg.de

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