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OpBox: Open Source Tools for Simultaneous EEG and EMG Acquisition from Multiple Subjects.

Eyal Y Kimchi1, Brian F Coughlin2, Benjamin E Shanahan2

  • 1Department of Neurology, Massachusetts General Hospital, Boston, MA, 02114 ekimchi@partners.org.

Eneuro
|October 16, 2020
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Summary

OpBox is an open-source toolkit enabling simultaneous electroencephalography (EEG) and electromyography (EMG) recordings from multiple rodents. This cost-effective system enhances flexibility and efficiency in electrophysiology data acquisition.

Keywords:
EEGEMGamplifierelectrophysiologyopen sourcerodent

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Computational Biology

Background:

  • * In vivo electrophysiology studies necessitate multi-subject, long-term data collection.
  • * Scaling simultaneous recordings for numerous subjects presents challenges in coordination, cost, and flexibility.

Purpose of the Study:

  • * To introduce OpBox, an open-source system for flexible, simultaneous electroencephalography (EEG) and electromyography (EMG) acquisition from multiple rodent subjects.
  • * To provide a cost-effective alternative to commercial solutions for high-density electrophysiology recordings.

Main Methods:

  • * Development of an integrated hardware and software solution using open-source tools and off-the-shelf components.
  • * MATLAB-based scripting for simultaneous collection and real-time display of analog/digital data streams (EEG, EMG, event triggers, encoder data).
  • * Real-time calculation and visualization of spectral representations and event-related potentials (ERPs).

Main Results:

  • * OpBox amplifier performance is comparable to commercial amplifiers (Grass P55, Intan RHD2000) in terms of signal-to-noise ratios, noise floors, and common mode rejection.
  • * The system reliably records multichannel data from multiple subjects, successfully tested with up to 12 simultaneous subjects on a single computer.
  • * OpBox offers a significantly lower cost per subject (approx. $500) compared to commercial systems.

Conclusions:

  • * OpBox provides a flexible, affordable, and scalable solution for simultaneous in vivo electrophysiology recordings.
  • * The open-source nature of OpBox promotes accessibility and customization for neuroscience research.
  • * This system facilitates more efficient and extensive electrophysiological data collection from multiple subjects.