Cited by 160Neuroscience and Neural EngineeringRetinal Development and DisordersPain Management and Treatment

Thresholds for Activation of Rabbit Retinal Ganglion Cells with Relatively Large, Extracellular Microelectrodes

Jensen, Ralph J., Ziv, Ofer R., Rizzo, Joseph F.·2005·Investigative Opthalmology & Visual Science

Abstract

PURPOSE: To investigate the responses of retinal ganglion cells (RGCs) to electrical stimulation, using electrodes comparable in size to those used in human studies investigating the feasibility of an electronic retinal prosthesis. METHODS: Rabbit retinas were stimulated in vitro with current pulses applied to the inner surface with 125- and 500-mum diameter electrodes while the responses of RGCs were recorded extracellularly. RESULTS: Both short-latency (SL; 3-5 ms) and long-latency (LL; >/=9 ms) responses were observed after electrical stimulation within the receptive field of an RGC. With short, 0.1-ms current pulses, the threshold current for the SL cell response was significantly lower than that for the LL cell response. With long (10- to 20-ms) pulses, the threshold currents for the SL and LL cell responses were very similar. The threshold current for the SL cell response increased more steeply than did the LL cell response when the electrode was displaced from the point of lowest electrical threshold, either above or along the surface of the retina. Stimulation of an RGC axon outside of the cell's receptive field produced only an SL response. For 0.1-ms duration pulses, the threshold current for the axonal response was significantly higher than the threshold current for the SL cell response. At pulse durations > 1 ms, the thresholds were very similar. CONCLUSIONS: RGC responses to electrical stimulation depend on the current pulse duration and location of the stimulating electrode. For an epiretinal prosthesis, short-duration current pulses may be preferable since they result in a more localized activation of the retina.

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Crossref · 10.1167/iovs.04-1018

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Authors
Jensen, R. J., Ziv, O. R., & Rizzo, J. F.
Affiliations
  • VA Boston Healthcare System (US)
  • Massachusetts Eye and Ear Infirmary (US)
Venue
Investigative Opthalmology & Visual Science
Published
2005-04-01
Volume
46
Issue
4
Pages
1486
ISSN
  • 0146-0404 (ISSN-L)
  • 1552-5783
OpenAlex
W2005579016
Cited by
159
References
32
Citations by year
2026: 2 · 2025: 3 · 2024: 5 · 2023: 1 · 2022: 7 · 2021: 8 · 2020: 12 · 2019: 5 · 2018: 7 · 2017: 6 · 2016: 3 · 2015: 8 · 2014: 9 · 2013: 12 · 2012: 7
FWCI
3.98
Type
journal article
Language
en
Open access
closed
Locations
  • Investigative Ophthalmology & Visual Science (publishedVersion)
  • PubMed (publishedVersion)
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
  • Health Sciences › Medicine › Anesthesiology and Pain Medicine › Pain Management and Treatment
Keywords
retinal ganglion cells, electrical stimulation, stimulation threshold, epiretinal prosthesis, pulse duration, short-latency responses, long-latency responses, receptive fields, rabbit retina
MeSH terms
Animals, Electric Conductivity, Electric Stimulation, Electrophysiology, Microelectrodes, Rabbits, Retinal Ganglion Cells, Sensory Thresholds

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