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Related Experiment Video

Updated: May 3, 2026

Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents
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Optogenetic micro-electrocorticography for modulating and localizing cerebral cortex activity.

Thomas J Richner1, Sanitta Thongpang, Sarah K Brodnick

  • 1Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA.

Journal of Neural Engineering
|January 22, 2014
PubMed
Summary
This summary is machine-generated.

This study presents an optogenetic electrocorticography (ECoG) neural interface for precisely modulating and recording brain activity. This technique allows for detailed spatial mapping of neural responses and has potential applications in epilepsy and neuroprosthetics.

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Optogenetics

Background:

  • Spatial localization of neural activity using electrocorticography (ECoG) is challenging.
  • Advancements in micro-ECoG technology require complementary methods for simultaneous neural modulation and recording.

Purpose of the Study:

  • To develop a novel neural interface combining optogenetics and micro-ECoG for precise control and recording of cortical activity.
  • To investigate the ability to spatially modulate and record neural activity using this integrated system.

Main Methods:

  • Developed a transparent polymer-based micro-ECoG array integrated with optogenetic stimulation capabilities.
  • Utilized cranial windowing in mice expressing Channelrhodopsin-2 for targeted photostimulation.
  • Recorded micro-ECoG signals during varied temporal, spatial, and frequency photostimuli applied to the cortical surface and at different depths via optical fiber.

Main Results:

  • Photostimulation evoked localized micro-ECoG potentials, with the ability to differentiate responses to multiple focal stimuli.
  • Stimulation at different cortical depths using an optical fiber produced complex micro-ECoG potentials with depth-dependent amplitude variations.
  • Evoked negative potentials up to 1.5 mV with broad cortical window stimulation.

Conclusions:

  • Optogenetic ECoG provides a powerful tool for spatially resolving neural activity.
  • This technology holds promise for advancing research in epilepsy, understanding cortical dynamics, and developing neuroprostheses.