Fig 5.

A, Midmodiolar cross-section of human cochlea. The basilar membrane (BM) separates the scala tympani (ST) and scala vestibuli (SV). B, An oblique coronal MPR of a preoperative MSCT at a midmodiolar level is shown. The scala tympani (ST), the scala vestibuli (SV), and the presumed level of the basilar membrane (BM) are indicated in the basal turn of the cochlea. 2nd turn indicates second turn of the cochlea; apex, apical turn of the cochlea, M, modiolus; IAC, internal auditory canal. C, MPR of a postoperative high-resolution MSCT image parallel to the modiolus and perpendicular to the basal turn of the cochlea. Although the basilar membrane (BM) itself cannot be visualized, the position of the electrode contacts does correspond with full insertion of the array in the scala tympani (ST).