Graeme Clark Collection

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http://hdl.handle.net/11343/375

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Author: Clark, Graeme × Author: Shepherd, Robert × End date: 1997 × Start date: 1990 × Type: Conference Paper × Subject: otolaryngology ×

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    Peri-modiolar electrode arrays: a comparison of electrode position n the human temporal bone
    Shepherd, R. K. ; Treaba, C. G. ; Cohen, L. ; Pyman, B. ; Huigen, J. ; Xu, J. ; Clark, Graeme M. (Monduzzi Editore, 1997)
    This paper describes a radiologic evaluation of three types of peri-modiolar arrays, comparing their trajectory within the scala tympani with a standard Mini-22 electrode. All peri-modiolar arrays were found to lie closer to the modiolus for much of their insertion length compared with the standard array. While one design showed evidence for the potential of increased insertion trauma, two designs produced satisfactory results. Although further electrode development, temporal bone and histopathologic studies arE required, it would appear that the benefits of peri-modiolar electrode arrays will be realised clinically.
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    Electrical stimulation of the auditory nerve: the influence of electrode position on neural excitation
    Hatsushika, Shin-ichi ; Shepherd, Robert K. ; Clark, Graeme M. ; Funasaka, Sotaro (Kugler & Ghendini, 1990)
    Improved speech recognition among cochlear implant patients would appear to be dependent on a number of factors including improved speech processing strategies and an improvement in the effectiveness of electrically stimulating residual auditory nerve fibers (i.e. lower thresholds, wider dynamic ranges and more localized current spread). Previous human temporal bone studies have shown that free fit scala tympani electrode arrays generally lay along the outer wall of the scala tympani. Therefore, there is a relatively large distance between the electrode array and the residual neural elements within Rosenthal's canal. In the present study, we systematically varied the location of the electrode within the scala tympani to examine the influence of electrode position on neural excitation.