Title of article :
Auditory temporal processes in normal-hearing individuals and in patients with auditory neuropathy
Author/Authors :
Henry J. Michalewski، نويسنده , , Arnold Starr، نويسنده , , Tin Toan Nguyen، نويسنده , , Ying-Yee Kong، نويسنده , , Fan-Gang Zeng، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
12
From page :
669
To page :
680
Abstract :
Objective To study objectively auditory temporal processing in a group of normal hearing subjects and in a group of hearing-impaired individuals with auditory neuropathy (AN) using electrophysiological and psychoacoustic methods. Methods Scalp recorded evoked potentials were measured to brief silent intervals (gaps) varying between 2 and 50 ms embedded in continuous noise. Latencies and amplitudes of N100 and P200 were measured and analyzed in two conditions: (1) active, when using a button in response to gaps; (2) passive, listening, but not responding. Results In normal subjects evoked potentials (N100/P200 components) were recorded in response to gaps as short as 5 ms in both active and passive conditions. Gap evoked potentials in AN subjects appeared only with prolonged gap durations (10–50 ms). There was a close association between gap detection thresholds measured psychoacoustically and electrophysiologically in both normals and in AN subjects. Conclusions Auditory cortical potentials can provide objective measures of auditory temporal processes. Significance The combination of electrophysiological and psychoacoustic methods converged to provide useful objective measures for studying auditory cortical temporal processing in normals and hearing-impaired individuals. The procedure used may also provide objective measures of temporal processing for evaluating special populations such as children who may not be able to provide subjective responses.
Keywords :
Evoked potentials (EPs) , Gap detection , psychoacoustics , N100 , P200
Journal title :
Clinical Neurophysiology
Serial Year :
2005
Journal title :
Clinical Neurophysiology
Record number :
523236
Link To Document :
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