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Clin Neurophysiol. 2010 Dec;121(12):2070-82. doi: 10.1016/j.clinph.2010.04.032. Epub 2010 Jun 8.

Neurophysiological evidence of impaired musical sound perception in cochlear-implant users.

Author information

1
Division of Neuropsychology, University of Zurich, Switzerland. pascale.sandmann@uni-oldenburg.de,

Abstract

OBJECTIVE:

Music perception with a cochlear implant (CI) can be unsatisfactory because current-day implants are primarily designed to enable speech discrimination. The present study aimed at evaluating electrophysiological correlates of musical sound perception in CI users to help achieve the long-term goal of improved restoration of hearing in those individuals.

METHODS:

Auditory discrimination accuracy in adult CI users (n=12) and matched normal-hearing controls (n=12) was measured by behavioral discrimination tasks and mismatch negativity (MMN) recordings. Discrimination profiles were obtained by using a set of clarinet sounds (original/vocoded) varying along different acoustic dimensions (frequency/intensity/duration) and deviation magnitudes (four levels).

RESULTS:

Behavioral results and MMN recordings revealed reduced auditory discrimination accuracy in CI users. An inverse relationship was found between MMN amplitudes and duration of profound deafness.

CONCLUSIONS:

CI users have difficulties in discriminating small changes in the acoustic properties of musical sounds. The recently developed multi-feature MMN paradigm (Pakarinen et al., 2007) can be used to objectively evaluate discrimination abilities of CI users for musical sounds.

SIGNIFICANCE:

Measuring auditory discrimination functions by means of a multi-feature MMN paradigm could be of substantial clinical value by providing a comprehensive profile of the extent of restored hearing in CI users.

PMID:
20570555
DOI:
10.1016/j.clinph.2010.04.032
[Indexed for MEDLINE]
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