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Opto-E-Dura: A Soft, Stretchable ECoG Array for Multimodal, Multiscale Neuroscience.

Aline F Renz1, Jihyun Lee1, Klas Tybrandt1,2

  • 1Institute for Biomedical Engineering, ETH Zurich, Zurich, 8092, Switzerland.

Advanced Healthcare Materials
|July 22, 2020
PubMed
Summary

Researchers developed a soft, transparent 16-channel electrocorticography array for brain interfaces. This device enables simultaneous optical and electrical recordings, improving brain function studies.

Keywords:
ECoGin vivomultimodal recordingpolydimethylsiloxanestretchable electronics

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Materials Science

Background:

  • Soft, stretchable materials offer superior biocompatibility for biomedical devices.
  • Conformal integration with tissues is crucial for long-term implant performance, especially in brain interfaces.
  • Current brain interfaces often lack multimodal capabilities to capture diverse physiological signals across scales.

Purpose of the Study:

  • To introduce the Opto-e-Dura, a novel soft, stretchable, and optically transparent 16-channel electrocorticography array.
  • To demonstrate the device's compatibility with various optical and electrical readout methods for multimodal brain monitoring.
  • To assess the chronic stability and utility of the array in conjunction with advanced imaging techniques.

Main Methods:

  • Fabrication of a 16-channel electrocorticography (ECoG) array using soft, stretchable, and optically transparent materials.
  • Integration and testing of the array with optical imaging modalities (wide-field and 2-photon calcium imaging).
  • Evaluation of chronic stability and compatibility with penetrating multielectrode arrays for repeated insertion.

Main Results:

  • The Opto-e-Dura array demonstrated chronic stability for several weeks.
  • The device enabled simultaneous electrophysiological recordings and optical imaging (calcium imaging).
  • The array facilitated multimodal studies bridging spatial and temporal scales of brain dynamics and allowed repeated insertion of other probes.

Conclusions:

  • The Opto-e-Dura provides a versatile platform for multimodal brain research.
  • This technology supports advanced brain interfaces by enabling simultaneous optical and electrical measurements.
  • The development of such conformable, multimodal devices is key to advancing our understanding of brain function and dysfunction.