Journal article
Neural adaptation and behavioral measures of temporal processing and speech perception in cochlear implant recipients
PloS one, Vol.8(12), pp.e84631-e84631
12/26/2013
DOI: 10.1371/journal.pone.0084631
PMCID: PMC3873438
PMID: 24386403
Abstract
The objective was to determine if one of the neural temporal features, neural adaptation, can account for the across-subject variability in behavioral measures of temporal processing and speech perception performance in cochlear implant (CI) recipients. Neural adaptation is the phenomenon in which neural responses are the strongest at the beginning of the stimulus and decline following stimulus repetition (e.g., stimulus trains). It is unclear how this temporal property of neural responses relates to psychophysical measures of temporal processing (e.g., gap detection) or speech perception. The adaptation of the electrical compound action potential (ECAP) was obtained using 1000 pulses per second (pps) biphasic pulse trains presented directly to the electrode. The adaptation of the late auditory evoked potential (LAEP) was obtained using a sequence of 1-kHz tone bursts presented acoustically, through the cochlear implant. Behavioral temporal processing was measured using the Random Gap Detection Test at the most comfortable listening level. Consonant nucleus consonant (CNC) word and AzBio sentences were also tested. The results showed that both ECAP and LAEP display adaptive patterns, with a substantial across-subject variability in the amount of adaptation. No correlations between the amount of neural adaptation and gap detection thresholds (GDTs) or speech perception scores were found. The correlations between the degree of neural adaptation and demographic factors showed that CI users having more LAEP adaptation were likely to be those implanted at a younger age than CI users with less LAEP adaptation. The results suggested that neural adaptation, at least this feature alone, cannot account for the across-subject variability in temporal processing ability in the CI users. However, the finding that the LAEP adaptive pattern was less prominent in the CI group compared to the normal hearing group may suggest the important role of normal adaptation pattern at the cortical level in speech perception.
Details
- Title: Subtitle
- Neural adaptation and behavioral measures of temporal processing and speech perception in cochlear implant recipients
- Creators
- Fawen Zhang - University of CincinnatiChelsea Benson - University of CincinnatiDora Murphy - University of CincinnatiMelissa Boian - University of CincinnatiMichael Scott - Cincinnati Children's Hospital Medical CenterRobert Keith - University of CincinnatiJing Xiang - Cincinnati Children's Hospital Medical CenterPaul Abbas - University of Iowa
- Resource Type
- Journal article
- Publication Details
- PloS one, Vol.8(12), pp.e84631-e84631
- DOI
- 10.1371/journal.pone.0084631
- PMID
- 24386403
- PMCID
- PMC3873438
- NLM abbreviation
- PLoS One
- ISSN
- 1932-6203
- eISSN
- 1932-6203
- Grant note
- 1R15DC011004-01 / NIDCD NIH HHS UL1 TR000077 / NCATS NIH HHS R15 DC011004 / NIDCD NIH HHS
- Language
- English
- Date published
- 12/26/2013
- Academic Unit
- Otolaryngology
- Record Identifier
- 9984383896502771
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