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Brain Mapping Using a Graphene Electrode Array
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Flexible, foldable, actively multiplexed, high-density electrode array for mapping brain activity in vivo.

Jonathan Viventi1, Dae-Hyeong Kim, Leif Vigeland

  • 1Department of Electrical and Computer Engineering, Polytechnic Institute of New York University, Brooklyn, New York, USA.

Nature Neuroscience
|November 15, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed new brain-computer interface devices using flexible transistors. This technology allows for dense, high-resolution brain activity recording, revealing seizures as spiral waves in the neocortex.

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Materials Science

Background:

  • Current brain electrode arrays face limitations in spatial coverage and resolution due to extensive wiring requirements.
  • Individually wiring passive sensors at the electrode-tissue interface hinders large-scale brain activity sampling.

Purpose of the Study:

  • To develop novel brain-machine interface devices overcoming the limitations of traditional electrode arrays.
  • To enable high-density recording and stimulation of neural activity with reduced wiring complexity.

Main Methods:

  • Integration of ultrathin, flexible silicon nanomembrane transistors into electrode arrays.
  • Development of dense arrays with thousands of amplified and multiplexed sensors.
  • In vivo recording of cat brain activity, including sleep spindles, visual evoked responses, and seizures.

Main Results:

  • Demonstrated a system with thousands of amplified and multiplexed sensors connected by fewer wires.
  • Successfully recorded spatial properties of brain activity in cats.
  • Observed that electrographic seizures can manifest as recurrent spiral waves propagating in the neocortex.

Conclusions:

  • The developed technology represents a significant advancement in brain-machine interface capabilities.
  • This new generation of devices promises enhanced diagnostic and therapeutic applications in clinical medicine and neuroscience research.
  • The findings offer new insights into the spatio-temporal dynamics of cortical seizures.