FLEXIBLE POSITIONER WITH SPINE ELECTRODE FOR USE WITH COCHLEAR ELECTRODE ARRAY
Publication Date: 2003-Mar-19
The IP.com Prior Art Database
An electrode system includes an electrode array and a positioner. The electrode system is adapted to be used with a cochlear stimulation system, or other neural stimulation system. When used with a cochlear stimulation system, the electrode system is inserted into the scala tympani of the cochlea. Electrode contacts on the electrode array are positioned and held in close proximity to the ganglion cells in the modiolus by the positioner at the same time that an elongate spine electrode, on a back side of the positioner, is located near a back wall of the scala tympani. During use, such electrode positioning guides steer stimulation current flowing between the electrode contacts of the array and the spine electrode of the positioner so that more effective stimulation of the target ganglion cells is realized. In one embodiment, the electrode array has spaced-apart electrode contacts exposed only along a medial side thereof; and the positioner has an elongate spine electrode located along the full length (or at least a substantial portion of the full length) of its back side.