Cited by 30Neuroscience and Neural EngineeringRetinal Development and DisordersVisual perception and processing mechanisms

High-Fidelity Reproduction of Visual Signals by Electrical Stimulation in the Central Primate Retina

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Gogliettino, Alex R., Madugula, Sasidhar S., Grosberg, Lauren E., Vilkhu, Ramandeep S., Brown, Jeff, Nguyen, Huy, Kling, Alexandra, Hottowy, Paweł +4 more·2023·The Journal of Neuroscience

Abstract

Electrical stimulation of retinal ganglion cells (RGCs) with electronic implants provides rudimentary artificial vision to people blinded by retinal degeneration. However, current devices stimulate indiscriminately and therefore cannot reproduce the intricate neural code of the retina. Recent work has demonstrated more precise activation of RGCs using focal electrical stimulation with multielectrode arrays in the peripheral macaque retina, but it is unclear how effective this can be in the central retina, which is required for high-resolution vision. This work probes the neural code and effectiveness of focal epiretinal stimulation in the central macaque retina, using large-scale electrical recording and stimulation ex vivo. The functional organization, light response properties, and electrical properties of the major RGC types in the central retina were mostly similar to the peripheral retina, with some notable differences in density, kinetics, linearity, spiking statistics, and correlations. The major RGC types could be distinguished by their intrinsic electrical properties. Electrical stimulation targeting parasol cells revealed similar activation thresholds and reduced axon bundle activation in the central retina, but lower stimulation selectivity. Quantitative evaluation of the potential for image reconstruction from electrically evoked parasol cell signals revealed higher overall expected image quality in the central retina. An exploration of inadvertent midget cell activation suggested that it could contribute high spatial frequency noise to the visual signal carried by parasol cells. These results support the possibility of reproducing high-acuity visual signals in the central retina with an epiretinal implant. SIGNIFICANCE STATEMENT Artificial restoration of vision with retinal implants is a major treatment for blindness. However, present-day implants do not provide high-resolution visual perception, in part because they do not reproduce the natural neural code of the retina. Here, we demonstrate the level of visual signal reproduction that is possible with a future implant by examining how accurately responses to electrical stimulation of parasol retinal ganglion cells can convey visual signals. Although the precision of electrical stimulation in the central retina was diminished relative to the peripheral retina, the quality of expected visual signal reconstruction in parasol cells was greater. These findings suggest that visual signals could be restored with high fidelity in the central retina using a future retinal implant.

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Crossref · 10.1523/jneurosci.1091-22.2023

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Authors
Gogliettino, A. R., Madugula, S. S., Grosberg, L. E., Vilkhu, R. S., Brown, J., Nguyen, H., Kling, A., Hottowy, P., Dąbrowski, W., Sher, A., Litke, A. M., & Chichilnisky, E. J.
Affiliations
  • Stanford University (US)
  • Stanford Medicine (US)
  • AGH University of Krakow (PL)
  • University of California, Santa Cruz (US)
Corresponding author
Gogliettino, Alex R.
Venue
The Journal of Neuroscience
Published
2023-05-15
Volume
43
Issue
25
Pages
4625-4641
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W4376604073
Cited by
30
References
88
Citations by year
2026: 10 · 2025: 8 · 2024: 9 · 2023: 1 · 2022: 2
FWCI
3.38
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • HHS | NIH | National Eye Institute (F31EY033636, F30-EY030776-03, R01-EY021271, R01-EY029247, P30-EY019005)
  • Polish National Science Centre (DEC-2013/10/M/NZ4/00268)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Keywords
retinal prosthesis, epiretinal stimulation, retinal ganglion cells, parasol cells, midget cells, central retina, macaque retina, image reconstruction, neural code, retinal degeneration, artificial vision
MeSH terms
Animals, Electric Stimulation, Macaca, Photic Stimulation, Retina, Retinal Ganglion Cells, Prostheses and Implants, Visual Prosthesis

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