Functional connectivity map of retinal ganglion cells for retinal prosthesis

Jang Hee Ye, Sang Baek Ryu, Kyunghwan Kim, Yong Sook Goo

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Retinal prostheses are being developed to restore vision for the blind with retinal diseases such as retinitis pigmentosa (RP) or age-related macular degeneration (AMD). Among the many issues for prosthesis development, stimulation encoding strategy is one of the most essential electrophysiological issues. The more we understand the retinal circuitry how it encodes and processes visual information, the greater it could help decide stimulation encoding strategy for retinal prosthesis. Therefore, we examined how retinal ganglion cells (RGCs) in in-vitro retinal preparation act together to encode a visual scene with multielectrode array (MEA). Simultaneous recording of many RGCs with MEA showed that nearby neurons often fired synchronously, with spike delays mostly within 1 ms range. This synchronized firing - narrow correlation - was blocked by gap junction blocker, heptanol, but not by glutamatergic synapse blocker, kynurenic acid. By tracking down all the RGC pairs which showed narrow correlation, we could harvest 40 functional connectivity maps of RGCs which showed the cell cluster firing together. We suggest that finding functional connectivity map would be useful in stimulation encoding strategy for the retinal prosthesis since stimulating the cluster of RGCs would be more efficient than separately stimulating each individual RGC.

Original languageEnglish
Pages (from-to)307-314
Number of pages8
JournalKorean Journal of Physiology and Pharmacology
Volume12
Issue number6
DOIs
Publication statusPublished - 2008 Dec 1

Fingerprint

Visual Prosthesis
Retinal Ganglion Cells
Heptanol
Kynurenic Acid
Retinal Diseases
Retinitis Pigmentosa
Gap Junctions
Macular Degeneration
Synapses
Prostheses and Implants
Neurons

All Science Journal Classification (ASJC) codes

  • Physiology
  • Pharmacology

Cite this

Ye, Jang Hee ; Ryu, Sang Baek ; Kim, Kyunghwan ; Goo, Yong Sook. / Functional connectivity map of retinal ganglion cells for retinal prosthesis. In: Korean Journal of Physiology and Pharmacology. 2008 ; Vol. 12, No. 6. pp. 307-314.
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Functional connectivity map of retinal ganglion cells for retinal prosthesis. / Ye, Jang Hee; Ryu, Sang Baek; Kim, Kyunghwan; Goo, Yong Sook.

In: Korean Journal of Physiology and Pharmacology, Vol. 12, No. 6, 01.12.2008, p. 307-314.

Research output: Contribution to journalArticle

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