1. NANOCI-Nanotechnology Based Cochlear Implant With Gapless Interface to Auditory Neurons
- Author
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Jing Zou, Pascal Senn, Herbert Keppner, Marika Mannerström, Miguel Llera, Filippo Gander, Alexandra Homsy, Stefan Hahnewald, Heval Benav, Jean-Paul Lellouche, Wei Liu, Hubert Löwenheim, Carolyn Garnham, Ehud Banin, Helge Rask-Andersen, Claudia Frick, Monika Kwiatkowska, Claude Jolly, Ilmari Pyykkö, Edith Laux, Aharon Gedanken, Marta Roccio, Nina Perkas, Péter Bakó, Ute Wank, Fredrik Edin, Hao Li, Karl-Heinz Wiesmüller, Pavel Mistrik, Masaaki Ishikawa, Marcus Müller, Peter Ulrich, and Stella Ostrovsky
- Subjects
0301 basic medicine ,Gapless interface ,Interface (computing) ,medicine.medical_treatment ,Oto-rino-laryngologi ,Audiology ,Hearing/physiology ,0302 clinical medicine ,Hearing ,Cochlear implant ,Nanotechnology ,Medicine ,610 Medicine & health ,Neurons ,Cochlear Implantation ,Sensory Systems ,Cochlea ,medicine.symptom ,Cochlear Implants/trends ,Cochlea/physiology ,Auditory nerve regeneration ,medicine.medical_specialty ,Neuron–electrode interface ,Hearing loss ,Neuron-electrode interface ,Guinea Pigs ,Multi-electrode array ,03 medical and health sciences ,Gapless playback ,otorhinolaryngologic diseases ,Animals ,Humans ,business.industry ,Nanotechnology/instrumentation ,Cochlear Implantation/instrumentation ,Electric Stimulation/instrumentation ,Guinea pig ,Highlights of the Aci Alliance 14th International Ci Conference ,Electric Stimulation ,ddc:616.8 ,Hydrogel ,Cochlear Implants ,030104 developmental biology ,BDNF ,Otorhinolaryngology ,Neurology (clinical) ,business ,Neurons/physiology ,030217 neurology & neurosurgery - Abstract
Cochlear implants (CI) restore functional hearing in the majority of deaf patients. Despite the tremendous success of these devices, some limitations remain. The bottleneck for optimal electrical stimulation with CI is caused by the anatomical gap between the electrode array and the auditory neurons in the inner ear. As a consequence, current devices are limited through 1) low frequency resolution, hence sub-optimal sound quality and 2), large stimulation currents, hence high energy consumption (responsible for significant battery costs and for impeding the development of fully implantable systems). A recently completed, multinational and interdisciplinary project called NANOCI aimed at overcoming current limitations by creating a gapless interface between auditory nerve fibers and the cochlear implant electrode array. This ambitious goal was achieved in vivo by neurotrophin-induced attraction of neurites through an intracochlear gel-nanomatrix onto a modified nanoCI electrode array located in the scala tympani of deafened guinea pigs. Functionally, the gapless interface led to lower stimulation thresholds and a larger dynamic range in vivo, and to reduced stimulation energy requirement (up to fivefold) in an in vitro model using auditory neurons cultured on multi-electrode arrays. In conclusion, the NANOCI project yielded proof of concept that a gapless interface between auditory neurons and cochlear implant electrode arrays is feasible. These findings may be of relevance for the development of future CI systems with better sound quality and performance and lower energy consumption. The present overview/review paper summarizes the NANOCI project history and highlights achievements of the individual work packages.
- Published
- 2017