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Updated: Jun 11, 2026

A Cost-Effective and Minimally Invasive Protocol for Chronic Multi-Site Electroencephalography Recording in Freely Moving Mice
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Long-Term Neural Recordings Using MEMS Based Movable Microelectrodes in the Brain.

Nathan Jackson1, Arati Sridharan, Sindhu Anand

  • 1School of Biological and Health Systems Engineering, Arizona State University Tempe, AZ, USA.

Frontiers in Neuroengineering
|July 10, 2010
PubMed
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This study introduces Micro Electro Mechanical Systems (MEMS) technology to move microelectrodes for better neural recordings. Movable microelectrodes improve signal quality in long-term rodent brain experiments.

Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Materials Science

Background:

  • Maintaining high-quality neural recordings is crucial for neural prosthetic devices.
  • Signal deterioration over time necessitates methods to access new neurons.

Purpose of the Study:

  • To develop and evaluate a Micro Electro Mechanical Systems (MEMS) based technology for movable microelectrodes.
  • To assess the impact of microelectrode movement on neural signal quality in chronic rodent brain recordings.

Main Methods:

  • Implantation of 12 movable microelectrode chips in adult rats.
  • Utilizing microscale electro-thermal actuators for controlled microelectrode movement (approx. 9 µm steps).
  • Comparison of signal-to-noise ratio (SNR) and noise amplitude before and after movement over 3 weeks and beyond.
Keywords:
brain machine interfacechronic brain implantneural interfaceneural prosthesesneural prosthesisneuronal recordingspolysiliconsingle unit activity

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Last Updated: Jun 11, 2026

A Cost-Effective and Minimally Invasive Protocol for Chronic Multi-Site Electroencephalography Recording in Freely Moving Mice
07:47

A Cost-Effective and Minimally Invasive Protocol for Chronic Multi-Site Electroencephalography Recording in Freely Moving Mice

Published on: October 10, 2025

High-density EEG Recordings of the Freely Moving Mice using Polyimide-based Microelectrode
06:59

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Published on: January 11, 2011

Construction of Microdrive Arrays for Chronic Neural Recordings in Awake Behaving Mice
10:44

Construction of Microdrive Arrays for Chronic Neural Recordings in Awake Behaving Mice

Published on: July 5, 2013

Main Results:

  • Microelectrode movement significantly improved average SNR from 14.61 dB to 18.13 dB within the first 3 weeks.
  • Noise amplitudes remained consistent before and after movement.
  • Beyond 3 weeks, functioning devices showed improved SNR (11.88 dB to 13.34 dB) after movement, despite packaging failure modes.

Conclusions:

  • MEMS-based movable microelectrodes can successfully improve neural signal quality in long-term rodent experiments.
  • Further advancements in packaging and surgical techniques are needed for chronic cortical recording.
  • This technology holds promise for enhancing the longevity and efficacy of neural prosthetic devices.