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  4. In vivo electrical stimulation of the optic nerve and hybrid computational model for neuroprosthetic applications
 
conference poster not in proceedings

In vivo electrical stimulation of the optic nerve and hybrid computational model for neuroprosthetic applications

Gaillet, Vivien  
•
Cutrone, Annarita
•
Vagni, Paola  
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July 7, 2018
11th Forum of European NeuroScience (FENS)

Blindness affects millions of people worldwide, dramatically decreasing their quality of life. Retinal dystrophies, such as age related macular degeneration and Retinitis Pigmentosa, which are leading causes of blindness in industrialized countries, currently have no cure. However, in both of these diseases, parts of the visual pathway remain intact and functional, and can elicit visual percepts when stimulated. Here, we are performing electrical stimulation of the optic nerve in rabbits that could lead to the development of a new neuroprosthetic device for sight restoration in blind patients. We opted to stimulate the optic nerve with a modified version of the SELINE electrode, a 12-channels flexible implant, shown to be biocompatible and able to selectively recruit different fascicles in the rat sciatic nerve. After optimization of the stimulation parameters, we demonstrated that the amplitude of the stimulating current and the number of stimulating pulses could modulate the intensity of the response in the visual cortex. We are now investigating more complex multi-channel stimulating protocols in order to show the possibility to selectively recruit different portions of the optic nerve. Lastly, we are currently developing a computational model of the optic nerve. It combines a 3D finite element method that allows to determine the voltage distribution generated in the optic nerve and a biophysical model of the optic nerve axons and their ionic channels dynamics that predicts which axonal population is recruited.

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conference poster not in proceedings
Author(s)
Gaillet, Vivien  
Cutrone, Annarita
Vagni, Paola  
Artoni, Fiorenzo  
Gilliéron, Samuel
Micera, Silvestro  
Ghezzi, Diego  
Date Issued

2018-07-07

Note

Abstracts of the FENS 2018 119th Forum of European NeuroScience, July 7-11 2018, Berlin, Germany.

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EPFL

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LNE  
TNE  
Event nameEvent placeEvent date
11th Forum of European NeuroScience (FENS)

Berlin, Germany

July 7-11 2018

Available on Infoscience
July 7, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/147147
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