Enhancing biocompatibility of the brain-machine interface: A review

Area of Science:

• Biomedical Engineering
• Neuroscience
• Materials Science

Background:

• Microelectrode implantation is crucial for neural circuit research and neuroprosthetic applications.
• Current neuroprostheses face challenges like inflammation and glial scarring at the electrode-tissue interface, impacting long-term function.

Purpose of the Study:

• To review current microelectrode materials and designs for neuroprosthetics.
• To discuss strategies for improving material properties to overcome biological and performance limitations.

Main Methods:

• Literature review of microelectrode materials and designs.
• Analysis of material properties (mechanical, physical, chemical, electrical) and their impact on neuroprosthetic performance.
• Discussion of inflammatory response and glial scar formation at electrode-tissue interfaces.

Main Results:

• Identified key material properties affecting neuroprosthetic performance and sustainability.
• Highlighted the role of inflammatory response and glial scarring as major challenges.
• Reviewed various materials and designs currently employed in microelectrode technology.

Conclusions:

• Enhancing microelectrode materials is essential for advancing neuroprosthetics.
• Optimizing material properties can mitigate adverse tissue reactions and improve device efficacy.
• Future research should focus on novel materials and designs for robust and long-lasting neural interfaces.