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Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice

Published on: June 29, 2018

Controlling the oscillation phase through precisely timed closed-loop optogenetic stimulation: a computational study.

Annette Witt¹, Agostina Palmigiano, Andreas Neef

¹Cognitive Neuroscience Department, German Primate Center, Bernstein Center for Computational Neuroscience, Max Planck Institute for Dynamics and Self-Organization Göttingen, Germany.

Frontiers in Neural Circuits

|April 26, 2013

Summary

This summary is machine-generated.

Precisely timed optogenetic stimulation can control brain circuit communication by shifting neural oscillation phases. This method offers a new way to study and potentially modulate brain network interactions.

Keywords:

closed-loop systems functional connectivity modeling optogenetic stimulation oscillations phase response

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Last Updated: May 12, 2026

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Published on: June 29, 2018

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Area of Science:

Neuroscience
Computational Neuroscience
Systems Neuroscience

Background:

Dynamic oscillatory coherence is crucial for flexible communication between brain circuits.
Existing experimental methods lack reliable control over phase-relations between neuronal populations.

Purpose of the Study:

To explore closed-loop optogenetic stimulation for controlling functional interactions via oscillatory coherence.
To investigate the precise timing requirements for effective phase-shifting of neural oscillations.

Main Methods:

Developed an electrophysiologically calibrated model of Channelrhodopsin 2 (ChR2)-induced photocurrents.
Simulated neural populations undergoing gamma oscillations, applying precisely-timed photostimulation pulses.
Modeled a two-population circuit to assess the impact on phase-locking and functional interactions.

Main Results:

Precisely-timed photostimulation can shift oscillation phases even at low transduction rates (<25%).
Stimulation efficacy depends critically on timing relative to the ongoing oscillation phase.
Local photostimulation can reorganize phase-locking patterns and modify functional interactions between connected populations.

Conclusions:

Closed-loop, precisely-timed optogenetic stimulation is a viable method to control neural oscillatory coherence.
This technique provides a powerful tool for testing the communication-through-coherence hypothesis.
The findings open avenues for understanding and manipulating brain network dynamics.