Figure 13.

The mean vertical trajectory curve for each category. Critical anatomic features were found at individually different positions along the scala tympani (ST). Here, the rollercoaster category appears critical for cochlear implantation, as it can force the electrode array initially into the downward direction and subsequently into the upward direction. This may lead to damage to the basilar membrane and penetration into the scala vestibuli at the 180° position. The sloping category has a critical position at 12 mm from the round window (RW), where a distinct peak in the vertical direction may favor basilar membrane damage. The intermediate category would have a probability of damage highest at 20 mm from the RW.