ArticleJournal of audiology & otology2025
Latency Characteristics of Auditory Brainstem Responses to Click and LS CE-Chirp Stimuli Under Monaural and Binaural Conditions.
Article in Journal of audiology & otology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
BACKGROUND AND
objectivesThe auditory brainstem response (ABR) represents a critical tool for evaluating auditory pathways. Although absolute and inter-peak latencies (IPLs) are commonly analyzed, the differences between different stimulus types and presentation modes, particularly during binaural processing, remain underexplored. This study compared the absolute latencies, IPLs, and binaural interaction component (BIC) latencies of ABRs elicited by click and LS CE-chirp stimuli under both monaural and binaural conditions. The present study analyzed the clinical features of cochlear function in Ramsay-Hunt syndrome. SUBJECTS AND
methodsTwenty-one adults with normal hearing aged 22-25 years underwent ABR testing using click and LS CE-chirp stimuli under binaural, right ear, and left ear conditions. Their absolute latencies, IPLs, and BIC latencies for waves I, III, and V were recorded. BIC latencies were calculated by subtracting each subject's binaural wave latency from their mean monaural latency.
resultsThe subjects' LS CE-chirp stimuli elicited significantly longer wave V latencies under binaural vs monaural conditions, although their click-evoked ABRs did not show significant differences across the different presentation modes evaluated. The wave III latencies were significantly longer for the LS CE-chirp stimuli under the binaural and right-ear conditions. The IPLs showed stimulus- and ear-dependent differences, with LS CE-chirps evoking shorter IPLs vs. regular clicks under some conditions. The BIC latencies for waves III and V were significantly longer for the LS CE-chirp stimuli, whereas those for wave I showed no significant differences.
conclusionsLS CE-chirp stimuli enhanced ABR detectability and revealed longer binaural processing times, particularly at higher auditory brainstem levels. These findings support the utility of LS CE-chirp in terms of assessing binaural integration and central auditory processing.
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