Journal article
Electrophysiologic channel interaction, electrode pitch ranking, and behavioral threshold in straight versus perimodiolar cochlear implant electrode arrays
The Journal of the Acoustical Society of America, Vol.119(3), pp.1538-1547
03/01/2006
DOI: 10.1121/1.2164969
PMID: 16583899
Abstract
The primary goal of this study was to examine electrophysiologic measures of channel interaction, electrode pitch discrimination ability using a pitch-ranking task, and behavioral threshold levels in individuals implanted with a straight electrode array versus a perimodiolar array. It was hypothesized that perimodiolar arrays should yield lower thresholds, less channel interaction as measured with the electrically evoked compound action potential (ECAP), and better electrode pitch-ranking ability. Results from ten adult Nucleus 24 recipients (N=5 straight array, N=5 perimodiolar Contour array) showed no significant difference in threshold between the two electrode designs; however, there was significantly better electrode pitch-ranking ability and less channel interaction as measured with the ECAP for perimodiolar electrodes. Additionally, there was a significant positive correlation between behavioral threshold and width of the ECAP interaction function for Contour group data. There was no significant correlation between behavioral threshold and electrode pitch-ranking ability. These data suggest that electrode design and/or perimodiolar position may reduce physiologic channel interaction in the cochlea and improve electrode pitch discrimination ability; however, this positive finding did not translate into significantly better speech perception ability for Contour subjects.
Details
- Title: Subtitle
- Electrophysiologic channel interaction, electrode pitch ranking, and behavioral threshold in straight versus perimodiolar cochlear implant electrode arrays
- Creators
- Michelle L Hughes - University of IowaPaul J Abbas
- Resource Type
- Journal article
- Publication Details
- The Journal of the Acoustical Society of America, Vol.119(3), pp.1538-1547
- DOI
- 10.1121/1.2164969
- PMID
- 16583899
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Grant note
- RR00059 / NCRR NIH HHS P50 DC00242 / NIDCD NIH HHS R03 DC007017 / NIDCD NIH HHS
- Language
- English
- Date published
- 03/01/2006
- Academic Unit
- Otolaryngology
- Record Identifier
- 9984383283302771
Metrics
12 Record Views