Anatomic studies of the Human Cochlea: Implications for Cochlear Implantation
Anatomical studies of the human cochlea are of value for cochlear implantation (CI) and may also increase our understanding of the function of the human hearing organ. Hearing loss is the most common sensory deficit.
Cochlear implantation is a major achievement in modern medicine. CI electrodes on the market are mostly designed either for a position along the inner modiolar wall (so-called peri-modiolar electrodes) or along the outer wall of scala tympani. Anatomic variations of the cochlea may influence its final position relative to the cochlea place/frequency map. With less invasive surgical techniques and shorter electrodes the fragile inner ear structures may also be conserved Preservation of residual hearing is now a goal in all cochlear implant surgery and better knowledge about anatomical variation may limit intra-cochlear damage.
Our collection of plastic human inner ear molds contains 325 specimens (Fig. 1). The applied method of casting temporal bone specimens was described by Wilbrand et al.(Wilbrand et al. 1974) Wadin (Wadin 1988) and Rask-Andersen et al. (Rask-Andersen et al. 1977).
Li H, Schart-Morén N, Rohani SA, Ladak HM, Rask-Andersen H, Agrawal S. 2020. Synchrotron Radiation-Based Reconstruction of the Human Spiral Ganglion: Implications for Cochlear Implantation. Ear Hear. 41(1):173–81
Liu W, Schrott-Fischer A, Glueckert R, Benav H, Rask-Andersen H. 2017. The Human “Cochlear Battery” – Claudin-11 Barrier and Ion Transport Proteins in the Lateral Wall of the Cochlea. Front. Mol. Neurosci. 10:
Mei X, Glueckert R, Schrott-Fischer A, Li H, Ladak HM, et al. 2020. Vascular Supply of the Human Spiral Ganglion: Novel Three-Dimensional Analysis Using Synchrotron Phase-Contrast Imaging and Histology. Sci. Rep. 10(1):5877
Rask-Andersen H, Stahle J, Wilbrand H. 1977. Human cochlear aqueduct and its accessory canals. Ann. Otol. Rhinol. Laryngol. 86(suppl.42, 5II):1–16
Wadin K. 1988. Imaging contributions to the temporal bone anatomy (high jugular fossae). Scand Audiol Suppl. 30:145–48
Wilbrand HF, Rask-Andersen H, Gilstring D. 1974. The vestibular aqueduct and the para-vestibular canal:An anatomic and roentgenologic investigation. Acta radiol. 15(4):337–55
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