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A hybrid micro-ECoG for functionally targeted multi-site and multi-scale investigation.

Patrick Jendritza1,2,3,4,5, Rickard Liljemalm6, Thomas Stieglitz7

  • 1Ernst Strüngmann Institute (ESI) for Neuroscience in Cooperation with Max Planck Society, Deutschordenstraße 46, 60528 Frankfurt, Germany.

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New hybrid micro-electrocorticography (µECoG) arrays enable simultaneous multi-scale brain recordings. These tools map brain activity and target specific neural populations for advanced systems neuroscience research.

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Systems Neuroscience

Background:

  • Coordinated brain activity across scales is crucial for function.
  • Understanding whole-brain dynamics requires tools to record from distributed, connected populations.
  • Current tools limit the ability to bridge local and global neural activity.

Purpose of the Study:

  • To introduce novel high-density, hybrid micro-electrocorticography (µECoG) arrays.
  • To demonstrate the arrays' capability for multi-scale brain activity studies.
  • To showcase their utility in functional mapping and targeted neural recordings.

Main Methods:

  • Development of hybrid µECoG arrays integrating silicone elastomers and polyimide films.
  • Utilizing photolithography for fine feature definition and optical transparency.
  • Demonstrating functional mapping in rats, cats, and marmosets.
  • Employing arrays for targeted insertion of depth electrodes for dense local sampling.
  • Integrating optogenetic stimulation for investigating cortico-cortical interactions.

Main Results:

  • Hybrid µECoG arrays facilitate high-throughput functional mapping of cortical regions.
  • Functional maps enable precise targeting of neural populations for multi-area laminar recordings.
  • Arrays support local optogenetic stimulation and investigation of feedforward cortico-cortical interactions.
  • Demonstrated suitability across multiple species (rats, cats, marmosets).

Conclusions:

  • Hybrid µECoG arrays are a versatile tool for systems neuroscience.
  • They bridge local and global brain dynamics by enabling multi-scale recordings.
  • These arrays advance the study of integrated brain function and neural circuitries.