Psychophysics and speech perception with a premodiolar electrode array
AuthorCohen, Lawrence T.; Clark, Graeme M.
Source TitleAbstract book IFOS Sydney '97
Document TypeConference Item
CitationsCohen, L. T., & Clark, G. M. (1997). Psychophysics and speech perception with a premodiolar electrode array. In Abstract book IFOS Sydney '97, Sydney.
Access StatusOpen Access
A perimodiolar electrode array, designed to lie closer to the modiolus than the standard Coclear Limited array and developed by the Cooperative Research Centre for Cochlear Implant, Speech and Hearing Research in conjunction with Cochlear Limited, has recently been implanted in an adult patient. While excellent speech results have been obtained using the standard array, it is hypothesised that the improved place coding expected from an array lying closer to the modiolus would result in improved speech perception. Analysis of a modified Stenvers view X-ray revealed that the most apical electrode was inserted to an angle of 311 0 and that the apical half of the array was considerably closer to the modiolus than would have been the case for a standard array. Thresholds and comfortable levels were correlated with the lateral position of the stimulated electrode in the scala tympani, being much reduced for the apical electrodes. Forward masking and electrode discrimination are being measured in order to study the spread of neural excitation and the distinctness of percepts for different electrodes.
Keywordsotolaryngology; otology; perimodiolar electrode ray; cochlear implant
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- Graeme Clark Collection