Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording.

Area of Science:

• Neuroscience
• Biomedical Engineering
• Optogenetics

Background:

• Optogenetics is crucial for neural signaling research, allowing precise control and monitoring of genetically modified neurons.
• Technological advancements aim to integrate optical stimulation with electrophysiological recording for comprehensive neural analysis.

Purpose of the Study:

• To develop and evaluate a novel implantable optrode array system for simultaneous optogenetic stimulation and neural recording.
• To demonstrate the system's efficacy in in vivo experiments.

Main Methods:

• Development of an implantable optrode array with 2x2 optical fibers and multichannel electrodes.
• Integration of a light-emitting diode (LED) light source and a microfabricated microlens array.
• In vivo implantation in mice for optogenetic light stimulation and electrophysiological recording of hippocampal neurons.

Main Results:

• Successful implantation and operation of the optrode array system.
• Demonstration of time-locked neural spikes in hippocampal excitatory neurons evoked by light stimuli.
• Validation of the system's capability for simultaneous neural modulation and monitoring.

Conclusions:

• The developed implantable optrode array system is effective for optogenetic investigations.
• This technology facilitates simultaneous optical control and electrophysiological recording of neural activity.
• The system shows promise for advancing research in neural signaling and brain-computer interfaces.