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Related Experiment Video

Updated: Oct 22, 2025

Large Volume, Behaviorally-relevant Illumination for Optogenetics in Non-human Primates
08:32

Large Volume, Behaviorally-relevant Illumination for Optogenetics in Non-human Primates

Published on: October 3, 2017

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Chronically implantable LED arrays for behavioral optogenetics in primates.

Rishi Rajalingham1,2, Michael Sorenson3, Reza Azadi4

  • 1Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA.

Nature Methods
|August 31, 2021
PubMed
Summary

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We developed Opto-Array, a new device for optogenetics in macaque brains. This tool enables precise neural silencing, leading to reliable visual deficits in behavioral tasks.

Area of Science:

  • Neuroscience
  • Primate Research

Background:

  • Optogenetics is crucial for studying brain function but is less developed in nonhuman primates.
  • Rhesus macaques are vital models for complex behaviors, yet large brains pose challenges for optogenetic manipulation.

Purpose of the Study:

  • To develop a high-throughput optogenetic tool for large primate brains.
  • To validate the effectiveness of this tool in perturbing neural activity and behavior.

Main Methods:

  • Developed Opto-Array, a chronically implantable light-emitting diode array.
  • Used Opto-Array for optogenetic silencing in the macaque primary visual cortex.
  • Assessed behavioral deficits in a luminance discrimination task and confirmed neural silencing and lack of heating effects.

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Related Experiment Videos

Last Updated: Oct 22, 2025

Large Volume, Behaviorally-relevant Illumination for Optogenetics in Non-human Primates
08:32

Large Volume, Behaviorally-relevant Illumination for Optogenetics in Non-human Primates

Published on: October 3, 2017

8.2K
Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording
06:36

Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording

Published on: September 1, 2022

4.0K
A MRI-Based Toolbox for Neurosurgical Planning in Nonhuman Primates
08:41

A MRI-Based Toolbox for Neurosurgical Planning in Nonhuman Primates

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Main Results:

  • Optogenetic silencing in the visual cortex reliably induced retinotopic visual deficits.
  • Confirmed local neural silencing via Opto-Array illumination.
  • Ruled out tissue heating as a cause for observed behavioral effects.

Conclusions:

  • Opto-Array is an effective tool for high-throughput optogenetic perturbation in large primate brains.
  • Enables precise manipulation of neural circuits to study complex behaviors in nonhuman primates.