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Comparison of P300 in CI-only versus bimodal stimulation

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Abstract
Introduction: Bimodal listeners combine a cochlear implant (CI) with a contralateral hearing aid (HA). Psychoacoustic research shows that bimodal listening can improve speech perception in noise, sound localization, and music appreciation. However, individual performance varies considerably. Many studies have examined bimodal benefit using behavioral measures. This study examines whether endogenous auditory evoked cortical responses can be used to assess bimodal benefit. Methods: Four experienced bimodal were included in the study. All subjects were implanted with either the Nucleus CI24RE(CA) or CI422 and wore a contralateral hearing aid. The cognitive P300 response was elicited using an oddball paradigm with a 500 Hz tone-burst as the standard and a 250 Hz tone-burst as the deviant stimulus. P300s were recorded in the CI-only (i.e. with the contralateral ear plugged) and bimodal condition (i.e. CI and HA). Results: Overall, P300 morphology was clearer in the bimodal than CI-only condition. Latencies were on average shorter in the bimodal (251 ms, SD 26.5 ms) compared to the CI-only condition (306 ms, SD 55.1 ms). Additionally, amplitudes were larger in the bimodal (21 μV, SD 1.9 μV) compared to the CI-only condition (12 μV, SD 4.3 μV). Conclusion: Preliminary data reveal that the bimodal condition elicited better P300 responses than the CI-only condition. Bimodal listeners may have used various cues to perform the discrimination task.

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Chicago
Van Yper, Lindsey, Ingeborg Dhooge, KATRIEN VERMEIRE, EDDY DE VEL, and Andy Beynon. 2015. “Comparison of P300 in CI-only Versus Bimodal Stimulation.” In WAS-dag, Samenvattingen. Werkgroep Auditief Systeem (WAS).
APA
Van Yper, L., Dhooge, I., VERMEIRE, K., DE VEL, E., & Beynon, A. (2015). Comparison of P300 in CI-only versus bimodal stimulation. WAS-dag, Samenvattingen. Presented at the WAS-dag, Werkgroep Auditief Systeem (WAS).
Vancouver
1.
Van Yper L, Dhooge I, VERMEIRE K, DE VEL E, Beynon A. Comparison of P300 in CI-only versus bimodal stimulation. WAS-dag, Samenvattingen. Werkgroep Auditief Systeem (WAS); 2015.
MLA
Van Yper, Lindsey, Ingeborg Dhooge, KATRIEN VERMEIRE, et al. “Comparison of P300 in CI-only Versus Bimodal Stimulation.” WAS-dag, Samenvattingen. Werkgroep Auditief Systeem (WAS), 2015. Print.
@inproceedings{7088888,
  abstract     = {Introduction: Bimodal listeners combine a cochlear implant (CI) with a contralateral hearing aid (HA). Psychoacoustic research shows that bimodal listening can improve speech perception in noise, sound localization, and music appreciation. However, individual performance varies considerably. Many studies have examined bimodal benefit using behavioral measures. This study examines whether endogenous auditory evoked cortical responses can be used to assess bimodal benefit.
Methods: Four experienced bimodal were included in the study. All subjects were implanted with either the Nucleus CI24RE(CA) or CI422 and wore a contralateral hearing aid. The cognitive P300 response was elicited using an oddball paradigm with a 500 Hz tone-burst as the standard and a 250 Hz tone-burst as the deviant stimulus. P300s were recorded in the CI-only (i.e. with the contralateral ear plugged) and bimodal condition (i.e. CI and HA).
Results: Overall, P300 morphology was clearer in the bimodal than CI-only condition. Latencies were on average shorter in the bimodal (251 ms, SD 26.5 ms) compared to the CI-only condition (306 ms, SD 55.1 ms). Additionally, amplitudes were larger in the bimodal (21 \ensuremath{\mu}V, SD 1.9 \ensuremath{\mu}V) compared to the CI-only condition (12 \ensuremath{\mu}V, SD 4.3 \ensuremath{\mu}V). 
Conclusion: Preliminary data reveal that the bimodal condition elicited better P300 responses than the CI-only condition. Bimodal listeners may have used various cues to perform the discrimination task.},
  author       = {Van Yper, Lindsey and Dhooge, Ingeborg and VERMEIRE, KATRIEN and DE VEL, EDDY and Beynon, Andy},
  booktitle    = {WAS-dag, Samenvattingen},
  language     = {eng},
  location     = {Rotterdam, Nederland},
  publisher    = {Werkgroep Auditief Systeem (WAS)},
  title        = {Comparison of P300 in CI-only versus bimodal stimulation},
  year         = {2015},
}