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Related Experiment Video

Updated: Jun 22, 2026

Interfacing 3D Engineered Neuronal Cultures to Micro-Electrode Arrays: An Innovative In Vitro Experimental Model
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Interfacing 3D Engineered Neuronal Cultures to Micro-Electrode Arrays: An Innovative In Vitro Experimental Model

Published on: October 18, 2015

Three-dimensional micro-electrode array for recording dissociated neuronal cultures.

Katherine Musick1, David Khatami, Bruce C Wheeler

  • 1Department of Electrical and Computer Engineering, University of Illinois, Urbana, IL, USA. kmusick@illinois.edu

Lab on a Chip
|July 2, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel 3D micro-electrode array (MEA) for culturing and recording from neural networks. This device supports long-term neuronal survival and activity monitoring in a 3D environment.

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Area of Science:

  • Neuroscience
  • Bioengineering
  • Materials Science

Background:

  • Advanced neural interfaces are crucial for understanding complex brain functions.
  • Existing microelectrode arrays (MEAs) are typically 2D, limiting the study of 3D neural network development and activity.
  • There is a need for systems that can support long-term 3D neuronal cultures and enable simultaneous recording and stimulation.

Purpose of the Study:

  • To design, fabricate, and characterize an electrically and fluidically active 3D MEA.
  • To evaluate the device's capability for long-term culturing and recording of 3D neuronal networks.
  • To demonstrate the potential of a layered construction approach for a new family of neural electrode arrays.

Main Methods:

  • Fabrication of a 3D MEA using a layered approach with silicon electrode layers and silicone elastomer fluidic layers.
  • Incorporation of polymer grids within silicon layers to promote neural growth.
  • Integration of gold electrodes for recording and stimulation, and micro-fluidic channels for nutrient supply and drug delivery.

Main Results:

  • Successful fabrication and characterization of the 3D MEA prototype.
  • Demonstrated long-term survival of rat cortical neurons in the 3D MEA for up to 28 days.
  • Achieved spontaneous and evoked electrical recordings from the 3D neuronal network.
  • Validated micro-fluidic functionality by perfusing tetrodotoxin to modulate neuronal activity.

Conclusions:

  • The developed 3D MEA is a functional platform for long-term culturing and electrophysiological recording of 3D neuronal networks.
  • The layered construction concept offers a versatile basis for developing next-generation neural electrode arrays.
  • This technology advances the study of neural network dynamics in a more physiologically relevant 3D context.