Electrode-place discrimination in children using cochlear implants [Abstract]
AuthorBusby, Peter A.; Clark, Graeme M.
Source TitleAbstracts Paediatric Cochlear Implantation. 4th European Symposium on Paediatric Cochlear Implantation
Document TypeConference Item
CitationsBusby, P. A., & Clark, G. M. (1998). Electrode-place discrimination in children using cochlear implants [Abstract]. In Abstracts Paediatric Cochlear Implantation. 4th European Symposium on Paediatric Cochlear Implantation, s-Hertogenbosch, Netherlands.
Access StatusOpen Access
Electrode-place discrimination was measured in a group of children implanted with the Cochlear Limited multiple-electrode prosthesis. An adaptive technique was used to obtain difference Iimens (DLs) for electrodes at the apical, mid, and basal positions on the array. The influence of loudness cues were minimised by randomly varying the electric stimulation levels. Most DLs for the three positions were less than 3 electrodes, although for some subjects limens were as large as 7 electrodes. The relationships between electrode DLs and subject characteristics, and between electrode DLs and speech perception performance were also examined. A significant correlation between age at implantation and electrode DLs for the basal position was found, indicating that subjects implanted at a later age had larger DLs for basal electrodes. No correlations were found for electrode DLs at the apical and mid positions. Also, electrode DLs for the three positions did not correlate with any other subject variables, such as duration of implant use. A significant negative correlation between electrode DLs for the apical position and speech scores for closed-set monosyllabic words was recorded, indicating that subjects with larger DLs had lower speech scores. No correlations were found for electrode DLs at the mid and basal positions, and electrode DLs did not correlate with scores for open-set speech tests.
Keywordsotolaryngology; cochlear implants; difference limens
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- Graeme Clark Collection