Figure 7
Three-dimensional morphological model of the cochlea with an inserted cochlear-implant electrode. (a) Logarithmic curve (black) defined by Eq. (1) and the subdomain surfaces (red contours) delineated from a cross-section of the human cochlea (Fig. 1b). (b) A full 3D model of the cochlea, red: scala vestibuli, yellow: scala media, blue: scala tympani, in which the cochlear-implant electrode (white dot) is located, green dot: Rosenthal’s canal. (c) Magnified view of the computational domain, showing the one-and-a-half turns of the cochlea implemented in this study and the orientation of 37 of the 45 spiral ganglion neurons (SGNs; zoomed inset). An SGN is composed of a spiral ganglion cell attached to both a peripheral and a central axonal initial segment. aEC: Active electrode contact, BM: Basilar membrane, CI: Cochlear-implant electrode, gEC: Ground electrode contact, OSL: Osseous spiral lamina, RM: Reissner’s membrane, RC: Rosenthal’s canal.
