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Control of cortical oscillatory frequency by a closed-loop system.

Mattia D'Andola1, Massimiliano Giulioni2, Vittorio Dante2

  • 1Systems Neuroscience, IDIBAPS, Rosselló 149-153, Barcelona, 08036, Spain.

Journal of Neuroengineering and Rehabilitation
|January 11, 2019
PubMed
Summary

Researchers developed a closed-loop system to control brain network oscillations. This system uses direct current (DC) electric fields to precisely adjust the frequency of slow oscillations (SO) in vitro.

Keywords:
Brain stimulationCortexDirect current stimulationEmergent propertiesIn vitroReal-timeSlow oscillationsStimulation

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Biophysics

Background:

  • Cortical networks in vitro generate spontaneous slow oscillations (SO).
  • Direct current (DC) electric fields can modulate the frequency of these SOs.
  • A system is needed to autonomously control SO frequency to a desired target.

Purpose of the Study:

  • To design and implement a closed-loop system for controlling in vitro cortical slow oscillation (SO) frequency.
  • To enable autonomous adjustment of emergent oscillatory activity to experimenter-defined target frequencies.

Main Methods:

  • Cortical activity recorded via electrode and analyzed online.
  • Closed-loop control achieved by injecting variable DC intensity to steer SO frequency.
  • Custom programmable stimulator designed for low-noise, accurate low-current tuning; commercial tools used for data acquisition and analysis.

Main Results:

  • A flexible and reliable system for in vitro SO frequency control was successfully developed.
  • The system ensures artifact removal, minimizes data acquisition gaps, and is robust to slice heterogeneity.

Conclusions:

  • The developed tool offers new avenues for studying cortical SO dynamics.
  • Cortical SOs are linked to cognitive processes like memory consolidation and are altered in neurological conditions.
  • The technology holds potential for future applications in neuroscience research and therapeutic interventions.