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Proceedings Paper

Electrical and optical co-stimulation in the deaf white cat
Author(s): Zhiping Cao; Yingyue Xu; Xiaodong Tan; Naofumi Suematsu; Alan Robinson; Claus-Peter Richter
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Paper Abstract

Spatial selectivity of neural stimulation with photons, such as infrared neural stimulation (INS) is higher than the selectivity obtained with electrical stimulation. To obtain more independent channels for stimulation in neural prostheses, INS may be implemented to better restore the fidelity of the damaged neural system. However, irradiation with infrared light also bares the risk of heat accumulation in the target tissue with subsequent neural damage. Lowering the threshold for stimulation could reduce the amount of heat delivered to the tissue and the risk for subsequent tissue damage. It has been shown in the rat sciatic nerve that simultaneous irradiation with infrared light and the delivery of biphasic sub-threshold electrical pulses can reduce the threshold for INS [1]. In this study, deaf white cats have been used to test whether opto-electrical co-stimulation can reduce the stimulation threshold for INS in the auditory system too. The cochleae of the deaf white cats have largely reduced spiral ganglion neuron counts and significant degeneration of the organ of Corti and do not respond to acoustic stimuli. Combined electrical and optical stimulation was used to demonstrate that simultaneous stimulation with infrared light and biphasic electrical pulses can reduce the threshold for stimulation.

Paper Details

Date Published: 12 February 2018
PDF: 7 pages
Proc. SPIE 10469, Optical Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2018, 104690U (12 February 2018); doi: 10.1117/12.2291839
Show Author Affiliations
Zhiping Cao, Northwestern Univ. Feinberg School of Medicine (United States)
Yingyue Xu, Northwestern Univ. Feinberg School of Medicine (United States)
Xiaodong Tan, Northwestern Univ. Feinberg School of Medicine (United States)
Naofumi Suematsu, Northwestern Univ. Feinberg School of Medicine (United States)
Osaka Univ. (Japan)
Alan Robinson, Northwestern Univ. Feinberg School of Medicine (United States)
Claus-Peter Richter, Northwestern Univ. Feinberg School of Medicine (United States)
Northwestern Univ. (United States)


Published in SPIE Proceedings Vol. 10469:
Optical Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2018
Brian J. F. Wong; Justus F. Ilgner; Max J. Witjes, Editor(s)

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