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3D Upconversion Barcodes for Combinatory Wireless Neuromodulation in Behaving Animals.

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Summary
This summary is machine-generated.

This study introduces a novel upconversion device for precise neural control in rodents. The technology allows for selective and combined optogenetic targeting of specific brain circuits, enabling new research into fear and anxiety behaviors.

Keywords:
neural interfacesremote neuromodulationselective brain stimulationupconversion nanoparticleswireless optogenetics

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Area of Science:

  • Neuroscience
  • Biotechnology
  • Materials Science

Background:

  • Existing optogenetic devices have limitations in targeting specific neurons and brain regions.
  • Current upconversion techniques often provide fixed light emission, restricting their application.

Purpose of the Study:

  • To develop a versatile upconversion device for spatially selective and combinatory optogenetics in behaving rodents.
  • To enable dynamic light delivery for precise neural circuit modulation.

Main Methods:

  • A hierarchical upconversion device in a multiarrayed optrode format was engineered.
  • Engineered upconversion nanoparticles (UCNPs) were barcode assembled into nanomachined optical pinholes.
  • The device allows for remotely addressable, spectrum-programmable, and spatially selective optical interrogation.

Main Results:

  • Three primary emissions (477, 540, 654 nm) were used to match different channelrhodopsins.
  • Selective modulation of basolateral amygdala and caudoputamen circuits was achieved.
  • Associated fear and anxiety behaviors in rodents were successfully differentiated.

Conclusions:

  • The 3D barcode upconversion device offers a significant advancement for optogenetic toolsets.
  • This technology opens new avenues for sophisticated neural control and circuit analysis.
  • The device enables precise investigation of complex brain circuits and associated behaviors.