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Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording
Published on: September 1, 2022
An efficient multiplexing method for addressing large numbers of electrodes in a visual neuroprosthesis
G J Suaning1, L E Hallum, P J Preston
1School of Engineering, University of Newcastle, Newcastle, Australia.
Summary
Researchers developed a faster neurostimulation circuit for visual prostheses. This advancement aims to improve image perception for blind patients by increasing electrode stimulation speed and reducing flicker.
Area of Science:
- Neuroscience and Biomedical Engineering
- Ophthalmology and Visual Prosthetics
Background:
- Clinical trials show modified cochlear implants can stimulate retinal neurons, eliciting spatially-mapped phosphenes in blind patients.
- Current visual prostheses require increased stimulation sites to convey complex visual information like shapes and characters.
Purpose of the Study:
- To describe an efficient method for addressing a large number of electrode sites in a neurostimulation circuit.
- To increase the speed of stimulation configuration for visual prostheses, mitigating perceived flicker.
Main Methods:
- Development of a novel neurostimulation circuit design.
- Focus on efficient addressing of multiple electrode sites for high-speed stimulation configuration.
Main Results:
- The described circuit enables efficient addressing of numerous electrode sites.
- This approach significantly increases the rate at which stimulation can be configured and delivered.
Conclusions:
- The proposed neurostimulation circuit is a critical step towards developing more effective visual prostheses.
- Faster stimulation delivery is essential for creating a useful visual prosthesis that conveys rudimentary images without flicker.
