Cortical responses reflecting comprehension abilities evoked with auditory, visual, and visual-then-auditory stimuli: Normal-hearing participants vs. cochlear implant users

Activity: Talks and presentationsConference presentations


Cross-modal cortical reorganization is known to occur in individuals with untreated hearing loss. However, the research literature is still unclear about the effects that regular use of hearing devices such as cochlear implants (CIs) have on this phenomenon. Here, we explored the effects of cross-modal plasticity in experienced CI users. Using multichannel electroencephalography, we tested individuals who had used CIs for at least 2 years and age-matched controls (N = 2 × 14). Using digit triplet stimuli, we evoked cortical responses known to reflect comprehension abilities, i.e., N400 and late positive complex (LPC) responses. The participants were tested in auditory, visual, and visual-then-auditory stimulus conditions. Comparison of the response amplitudes and latencies from these conditions is expected to provide insights into cross-modal plasticity. The absence of any group difference would indicate that regular CI use can reverse the effects of cross-modal reorganization caused by untreated hearing loss. Alternatively, if group differences are observed, this would indicate no or only a partial reversal due to CI treatment. In the case of group differences, we would expect larger amplitudes and longer latencies in the CI group. Such differences would be indicative of more cognitive processing related to stimulus ‘repair’ required to compensate for the degraded auditory input from the CI device.
Period7. Oct 20228. Oct 2022
Event titleAnnual meeting of the Danish Technical Audiological Society
Event typeConference
Conference number2022
LocationStouby, DenmarkShow on map
Degree of RecognitionNational