Signal and response properties indicate an optoacoustic effect underlying the intra-cochlear laser-optical stimulation

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dc.identifier.uri http://dx.doi.org/10.15488/2536
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/2562
dc.contributor.author Kallweit, Nicole
dc.contributor.author Baumhoff, Peter
dc.contributor.author Krueger, Alexander
dc.contributor.author Tinne, Nadine
dc.contributor.author Heisterkamp, Alexander
dc.contributor.author Kral, Andrej
dc.contributor.author Maier, Hannes
dc.contributor.author Ripken, Tammo
dc.date.accessioned 2017-12-12T11:54:20Z
dc.date.available 2017-12-12T11:54:20Z
dc.date.issued 2016
dc.identifier.citation Kallweit, N.; Baumhoff, P.; Krueger, A.; Tinne, N.; Heisterkamp, A. et al.: Signal and response properties indicate an optoacoustic effect underlying the intra-cochlear laser-optical stimulation. In: Proceedings of SPIE 9689 (2016), 96892G. DOI: https://doi.org/10.1117/12.2210926
dc.description.abstract Optical cochlea stimulation is under investigation as a potential alternative to conventional electric cochlea implants in treatment of sensorineural hearing loss. If direct optical stimulation of spiral ganglion neurons (SGNs) would be feasible, a smaller stimulation volume and, therefore, an improved frequency resolution could be achieved. However, it is unclear whether the mechanism of optical stimulation is based on direct neuronal stimulation or on optoacoustics. Animal studies on hearing vs. deafened guinea pigs already identified the optoacoustic effect as potential mechanism for intra-cochlear optical stimulation. In order to characterize the optoacoustic stimulus more thoroughly the acoustic signal along the beam path of a pulsed laser in water was quantified and compared to the neuronal response properties of hearing guinea pigs stimulated with the same laser parameters. Two pulsed laser systems were used for analyzing the influence of variable pulse duration, pulse energy, pulse peak power and absorption coefficient. Preliminary results of the experiments in water and in vivo suggesta similar dependency of response signals on the applied laser parameters: Both datasets show an onset and offset signal at the beginning and the end of the laser pulse. Further, the resulting signal amplitude depends on the pulse peak power as well as the temporal development of the applied laser pulse. The data indicates the maximum of the first derivative of power as the decisive factor. In conclusion our findings strengthen the hypothesis of optoacoustics as the underlying mechanism for optical stimulation of the cochlea. © SPIE 2016 eng
dc.language.iso eng
dc.publisher Bellingham, WA : S P I E - International Society for Optical Engineering
dc.relation.ispartofseries Proceedings of SPIE 9689 (2016)
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
dc.subject Pulsed laser operation eng
dc.subject In vivo imaging eng
dc.subject Signal detection eng
dc.subject Absorption eng
dc.subject Laser systems engineering eng
dc.subject Infrared radiation eng
dc.subject Sensors eng
dc.subject.ddc 620 | Ingenieurwissenschaften und Maschinenbau ger
dc.title Signal and response properties indicate an optoacoustic effect underlying the intra-cochlear laser-optical stimulation eng
dc.type article
dc.type conferenceObject
dc.type Text
dc.relation.issn 16057422
dc.relation.doi https://doi.org/10.1117/12.2210926
dc.bibliographicCitation.volume 9689
dc.bibliographicCitation.firstPage 96892G
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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