Flexible Surface Electrodes for Electrocorticography in Neurological Diseases and Brain-Computer Interface...

Area of Science:

• Neuroscience
• Materials Science
• Biomedical Engineering

Background:

• Traditional electrocorticography (ECoG) arrays lack mechanical flexibility, hindering optimal brain contact.
• Current ECoG systems face limitations in channel count due to bulky cabling.

Purpose of the Study:

• To review recent technological advancements in flexible ECoG surface electrode arrays.
• To explore emerging strategies for applying these arrays in neurological disorder diagnosis and treatment.
• To present current efforts in integrating ECoG electrodes into brain-computer interface (BCI) systems.

Main Methods:

• Integration of flexible nanomaterials and advanced patterning techniques for electrode fabrication.
• Development of ultrathin, high-density electrode arrays with conformal cortical contact.
• Incorporation of on-site amplification and multiplexing capabilities within electrode arrays.

Main Results:

• New ECoG arrays achieve intimate cortical surface conformance.
• Stable impedance is maintained over extended implantation periods.
• Advancements enable higher channel counts and improved signal acquisition for BCIs.

Conclusions:

• Flexible ECoG electrode technology is crucial for next-generation brain-computer interfaces.
• These advanced arrays hold significant potential for diagnosing and treating neurological disorders.
• Further integration of ECoG surfaces into BCI systems is driven by neural signal utilization.