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High-density Electroencephalographic Acquisition in a Rodent Model Using Low-cost and Open-source Resources
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Intsy: a low-cost, open-source, wireless multi-channel bioamplifier system.

Jonathan C Erickson1, James A Hayes1, Mauricio Bustamante1

  • 1Department of Physics and Engineering, Washington and Lee University, Lexington, VA 24450, United States of America.

Physiological Measurement
|February 7, 2018
PubMed
Summary
This summary is machine-generated.

A new, low-cost bioamplifier system offers high-quality, wireless 32/64-channel recordings. This system provides comparable signal quality to commercial devices, making electrophysiological research more accessible.

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Area of Science:

  • Biomedical Engineering
  • Electrophysiology
  • Wearable Technology

Background:

  • Multi-channel electrical recordings are crucial across various biomedical fields.
  • Existing systems can be costly and lack wireless capabilities, limiting accessibility.

Purpose of the Study:

  • To develop and validate a high-quality, low-cost 32/64-channel bioamplifier system.
  • To enable real-time wireless data streaming for electrophysiological experiments.

Main Methods:

  • Integration of off-the-shelf components: Intan RHD2132 bioamplifier, Teensy 3.2 microcontroller, and RN-42 Bluetooth module.
  • Custom LabView interface for real-time data visualization.
  • Validation through measurement of gastric slow waves and forearm EMG, with comparison to a Biosemi ActiveTwo system.

Main Results:

  • The 'Intsy' system demonstrated signal quality quantitatively comparable to the gold-standard commercial system.
  • High signal-to-noise ratios (SNR) were achieved for both gastric slow waves (24 ± 2.7 dB) and EMG (⩾10 dB).
  • Stable wireless data streaming at 3.5 kS/s and USB-wired transmission at 64 kS/s were achieved.

Conclusions:

  • The Intsy system offers the highest channel count among open-source, wireless bioamplifiers.
  • Its flexibility, portability, and affordability significantly lower the entry barrier for electrophysiological research.
  • The system is suitable for diverse applications including gastrointestinal, cardiac, neural, and neuromuscular studies.