Cortical Auditory Plasticity of Coclear Implant Users.
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2023-12-08
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en
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Introduction: In this research, the goal was to investigate the cortical auditory neural plasticity of adult CI users over time. The study investigates whether subjects demonstrate changes in the evoked potential P300’s latency and amplitude, as well as speech perception, after nine years of CI use.
Methods: In this longitudinal study, auditory cortical responses of the P300 evoked potential, elicited by pure-tone stimuli within an oddball paradigm, were recorded in twenty CI users, divided in three groups: congenital (N = 4), prelingual (N = 7) and postlingual (N= 9) deaf individuals. Additionally, the speech recognition score of each subject was assessed using speech audiometry. All subjects participated in a similar research, executed nine years ago, which allows a within-subject comparison between the two times of measurements.
Results: Significant shorter P300 latencies were found for the measurement of 2023 compared to 2014 (p = .033). The amplitude of the P300 was also higher for the measurement of 2023, however only partial significant. No significant difference was found for the speech recognition between the two times of measurement. Additionally, no significant correlation was found between the speech recognition and the P300 characteristics. The postlingual group showed better speech recognition than the congenital and prelingual group (p = .009).
Conclusion: the auditory cortex of adult CI users appears to show neural plasticity, reflected in,
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