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Large Volume, Behaviorally-relevant Illumination for Optogenetics in Non-human Primates
Published on: October 3, 2017
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Large Volume, Behaviorally-relevant Illumination for Optogenetics in Non-human Primates.
Leah C Acker1, Erica N Pino2, Edward S Boyden3
1McGovern Institute, Massachusetts Institute of Technology; Harvard-MIT Division of Heath Sciences and Technology; Department of Anesthesiology, Duke University Medical Center; leah.acker@duke.edu.
Journal of Visualized Experiments : Jove
|October 11, 2017
Summary
A novel large-volume illuminator enhances optogenetic manipulation in non-human primate brains. This plastic optical fiber tool enables broader light distribution for behavioral studies with minimal tissue damage.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Optogenetics
Background:
- Optogenetic manipulation requires precise light delivery to targeted brain regions.
- Conventional optical fibers have limitations in light distribution volume and fragility.
Purpose of the Study:
- To describe the development and application of a large-volume illuminator for optogenetics in non-human primates.
- To facilitate behavioral studies by enabling illumination of larger tissue volumes.
Main Methods:
- Construction of a modified plastic optical fiber with an etched tip for increased light emission surface area.
- Quality-control calibration to ensure uniform light distribution.
- Techniques for safe insertion and removal of the illuminator.
Main Results:
- The large-volume illuminator provides >100x light emitting surface area compared to conventional fibers.
- It delivers light over behaviorally-relevant tissue volumes (≈ 10 mm³).
- The plastic construction prevents shattering and allows flexibility, reducing penetration damage.
Conclusions:
- The developed large-volume illuminator is a robust tool for optogenetic research in non-human primates.
- It overcomes limitations of traditional fibers, enabling effective illumination of both superficial and deep brain structures.
- Facilitates advanced behavioral studies by improving light delivery efficiency and safety.
