Preliminary results of the relationship between the binaural interaction component of the electrically evoked auditory brainstem response and interaural pitch comparisons in bilateral cochlear implant recipients
Ear and Hearing, ISSN: 0196-0202, Vol: 33, Issue: 1, Page: 57-68
2012
- 14Citations
- 70Captures
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Metrics Details
- Citations14
- Citation Indexes14
- 14
- CrossRef9
- Captures70
- Readers70
- 61
Article Description
Objective: The purpose of this study was to investigate the relationship between electrophysiologic measures of the binaural interaction component (BIC) of the electrically evoked auditory brainstem response and psychophysical measures of interaural pitch comparisons in Nucleus bilateral cochlear implant users. Design: Data were collected for 10 postlingually deafened adult cochlear implant users. Each subject conducted an interaural pitch-comparison task using a biphasic pulse train with a pulse rate of 1000 pulses per second (pps) at high stimulation levels. Stimuli were presented in a two-interval, two-alternative forced-choice procedure with roving current variations. A subgroup of four subjects repeated the task at low stimulation levels. BICs were measured using loudness balanced, biphasic current pulses presented at a rate of 19.9 pps for each subject by pairing the electrode 12 (out of 22 intracochlear electrodes) in the right ear with each of 11 electrodes spaced across the electrode array in the left ear. The BIC was measured at high stimulation levels in 10 subjects and at low stimulation levels in 7 subjects. Because of differences in stimulation rate used in BIC measures and interaural pitch comparisons, the actual stimulation levels were different in these two measures. The relationship between BIC responses and results of interaural pitch comparisons was evaluated for each of the individual subjects and at the group level. Evaluation was carried out separately for results obtained at high and low stimulation levels. Results: There was no significant correlation between results of BIC measures and interaural pitch comparisons on either the individual or group levels. Lower stimulation level did not improve the relationship between these two measures. Conclusions: No significant correlations between psychophysical measures of interaural pitch comparisons and electrophysiologic measures of the BIC of the electrically evoked auditory brainstem response were found. The lack of correlation may be attributed to methods used to quantify the data, small number of subjects retested at low stimulation levels, and central processing components involved in the interaural pitch-comparison task. © 2012 by Lippincott Williams & Wilkins.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84855215402&origin=inward; http://dx.doi.org/10.1097/aud.0b013e31822519ef; http://www.ncbi.nlm.nih.gov/pubmed/21730858; https://journals.lww.com/00003446-201201000-00006; http://Insights.ovid.com/crossref?an=00003446-201201000-00006; https://dx.doi.org/10.1097/aud.0b013e31822519ef; https://journals.lww.com/ear-hearing/Abstract/2012/01000/Preliminary_Results_of_the_Relationship_Between.6.aspx
Ovid Technologies (Wolters Kluwer Health)
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