Transparent intracortical microprobe array for simultaneous spatiotemporal optical stimulation and multichannel...

Area of Science:

• Neuroscience
• Biomedical Engineering
• Materials Science

Background:

• Optogenetics enables precise control of neural circuits using light, crucial for studying brain function in vivo.
• Current limitations exist in devices capable of simultaneous light delivery and neural activity sensing for network-level analysis.
• Developing versatile tools is essential for advancing our understanding of complex neural dynamics.

Purpose of the Study:

• To create and validate a novel optoelectronic actuator and sensor microarray for simultaneous neural circuit perturbation and recording.
• To demonstrate the application of these microarrays in studying light-induced cortical microcircuit dynamics in vivo.
• To explore the potential for expanded functionalities including optical imaging and electrical microstimulation.

Main Methods:

• Fabrication of monolithic intracortical implants using optically transparent, electrically conductive ZnO semiconductor crystal.
• Integration of simultaneous light delivery and electrical readout capabilities within a microprobe array.
• Application of the device in transgenic mice to investigate light-perturbed cortical microcircuit dynamics and behavioral effects.

Main Results:

• Successful creation of ZnO-based optoelectronic microarrays capable of precise, simultaneous light delivery and electrical recording.
• Demonstration of the device's utility in mapping neural population dynamics during optogenetic manipulation in vivo.
• Observation of light-perturbed cortical microcircuit dynamics and their impact on behavior in transgenic mouse models.

Conclusions:

• The developed optoelectronic microarrays offer a versatile platform for simultaneous optogenetic control and neural sensing.
• This technology advances the study of neural circuit dynamics at the network level, particularly in rodent models.
• Future applications may include advanced optical imaging and patterned electrical microstimulation for comprehensive neural interfacing.