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Eur Ann Otorhinolaryngol Head Neck Dis. 2016 Jun;133 Suppl 1:S63-5. doi: 10.1016/j.anorl.2016.04.014. Epub 2016 May 30.

Optimal electrode design: Straight versus perimodiolar.

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Global Head of Professional, Surgical & Clinical Strategy, Cochlear Limited, Macquarie University, 1 University Avenue, 2109 Sydney, NSW, Australia. Electronic address:
The Wilmslow Hospital, Wilmslow, United Kingdom.


The electrode in a cochlear implant (CI) system is a key factor in hearing performance as it is the interface between the device and the auditory pathway of the recipient. The first CI electrodes were straight and thus adopted a lateral wall position. Subsequent innovations include: perimodiolar electrodes designed to lie adjacent to the modiolar wall and thus to provide more spatially-focused stimulation of the spiral ganglion cells; shorter atraumatic straight electrodes for combined electric and acoustic (hybrid) stimulation. This paper explores the relative merits of straight and perimodiolar electrodes in the search for the optimal electrode design with reference to electrodes from Cochlear(®).


Cochlear implant; Design; Hybrid stimulation; Perimodiolar electrode

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