Psychophysical assessment of stimulation sites in auditory prosthesis electrode arrays.

Abstract:

:Auditory prostheses use implanted electrode arrays that permit stimulation at many sites along the tonotopic axis of auditory neurons. Psychophysical studies demonstrate that measures of implant function, such as detection and discrimination thresholds, vary considerably across these sites, that the across-site patterns of these measures differ across subjects, and that the likely mechanisms underlying this variability differ across measures. Psychophysical and speech recognition studies suggest that not all stimulation sites contribute equally to perception with the prosthesis and that some sites might have negative effects on perception. Studies that reduce the number of active stimulation sites indicate that most cochlear implant users can effectively utilize a maximum of only about seven sites in their processors. These findings support a strategy for improving implant performance by selecting only the best stimulation sites for the processor map. Another approach is to revise stimulation parameters for ineffective sites in an effort to improve acuity at those sites. In this paper, we discuss data supporting these approaches and some potential pitfalls.

journal_name

Hear Res

journal_title

Hearing research

authors

Pfingst BE,Burkholder-Juhasz RA,Zwolan TA,Xu L

doi

10.1016/j.heares.2007.11.007

subject

Has Abstract

pub_date

2008-08-01 00:00:00

pages

172-83

issue

1-2

eissn

0378-5955

issn

1878-5891

pii

S0378-5955(07)00266-3

journal_volume

242

pub_type

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