Monolithic multimodal neural probes for sustained stimulation and long-term neural recording

Area of Science:

• Neuroengineering
• Biomedical Devices
• Neural Interfaces

Background:

• Long-term neural probes are essential for in vivo neural loop modulation.
• Conventional probes face challenges with mechanical rigidity, electrical performance, and biocompatibility.

Purpose of the Study:

• To develop a novel monolithic neural probe integrating optical stimulation and electrical recording.
• To overcome limitations of traditional "add-on" probe designs.

Main Methods:

• Direct laser writing of electrode arrays onto curved optical fiber surfaces.
• Integration of electrodes within a biocompatible polymer coating for monolithic probes.
• Facilitation of multilayer electrode integration for high-density channels.

Main Results:

• Monolithic probes exhibit high mechanical bending endurance and stable impedance.
• Demonstrated improved biocompatibility with a reduced inflammatory response.
• Enabled high-density electrical readout channels through multilayer integration.

Conclusions:

• The developed monolithic neural probes represent a significant advancement in neuroengineering.
• These probes show promise for future neural monitoring and modulation applications.
• The direct laser writing method offers a versatile approach for creating advanced neural interfaces.