Modified toolbox for optogenetics in the nonhuman primate

Ji Dai; Ilker Ozden; Daniel I. Brooks; Fabien Wagner; Travis May; Naubahar S. Agha; Benjamin R. Brush; David Borton; Arto V. Nurmikko; David L. Sheinberg

doi:10.1117/1.NPh.2.3.031202

29 May 2015 Modified toolbox for optogenetics in the nonhuman primate

Ji Dai, Ilker Ozden, Daniel I. Brooks, Fabien Wagner, Travis May, Naubahar S. Agha, Benjamin R. Brush, David Borton, Arto V. Nurmikko, David L. Sheinberg

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Neurophotonics, Vol. 2, Issue 3, 031202 (May 2015). https://doi.org/10.1117/1.NPh.2.3.031202

Abstract

Attracted by the appealing advantages of optogenetics, many nonhuman primate labs are attempting to incorporate this technique in their experiments. Despite some reported successes by a few groups, many still find it difficult to develop a reliable way to transduce cells in the monkey brain and subsequently monitor light-induced neuronal activity. Here, we describe a methodology that we have developed and successfully deployed on a regular basis with multiple monkeys. All devices and accessories are easy to obtain and results using these have been proven to be highly replicable. We developed the “in-chair” viral injection system and used tapered and thinner fibers for optical stimulation, which significantly improved the efficacy and reduced tissue damage. With these methods, we have successfully transduced cells in multiple monkeys in both deep and shallow cortical areas. We could reliably obtain neural modulation for months after injection, and no light-induced artifacts were observed during recordings. Further experiments using these methods have shown that optogenetic stimulation can be used to bias spatial attention in a visual choice discrimination task in a way comparable to electrical microstimulation, which demonstrates the potential use of our methods in both fundamental research and clinical applications.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Ji Dai, Ilker Ozden, Daniel I. Brooks, Fabien Wagner, Travis May, Naubahar S. Agha, Benjamin R. Brush, David Borton, Arto V. Nurmikko, and David L. Sheinberg "Modified toolbox for optogenetics in the nonhuman primate," Neurophotonics 2(3), 031202 (29 May 2015). https://doi.org/10.1117/1.NPh.2.3.031202

Published: 29 May 2015

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