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Multimodal Characterization of Neural Networks Using Highly Transparent Electrode Arrays.

Mary J Donahue1, Attila Kaszas2, Gergely F Turi3

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|February 21, 2019
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Summary
This summary is machine-generated.

Researchers developed transparent, flexible electrodes using poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) for simultaneous neural recording and imaging. This technology enables high-quality in vivo electrophysiology alongside optical microscopy of neural networks.

Keywords:
PEDOT:PSSelectrophysiologyneuroengineeringorganic electronicstransparent electronicstwo-photon imaging

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Area of Science:

  • Bioelectronics
  • Neuroscience
  • Materials Science

Background:

  • Transparent and flexible materials are crucial for advanced bioelectronic applications, particularly neural interfacing.
  • Low electrochemical electrode impedance is essential for effective neural recording and stimulation.

Purpose of the Study:

  • To fabricate small, transparent, and flexible electrodes using PEDOT:PSS for simultaneous in vivo neural recording and two-photon (2P) microscopy.
  • To demonstrate the utility of these electrodes in correlating electrophysiological activity with optical imaging of neural networks.

Main Methods:

  • Fabrication of microelectrodes using the conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS).
  • Induction of pathophysiological activity in the mouse cortex using 4-aminopyridine (4AP).
  • Simultaneous electrophysiological recording and two-photon (2P) calcium imaging in vivo.

Main Results:

  • PEDOT:PSS electrodes provided low impedance for high-quality neural activity recordings.
  • The electrodes were small enough to allow unencumbered optical access for imaging.
  • Induced calcium activity in the neuronal network correlated well with electrophysiological recordings.

Conclusions:

  • The developed PEDOT:PSS microelectrodes offer a valuable tool for complementary analysis of neural activity.
  • This approach integrates high temporal resolution electrophysiology with optical imaging for comprehensive neuroscience research.