Supracortical Microstimulation: Advances in Microelectrode Design and In Vivo Validation

Area of Science:

• Neuroscience
• Biomedical Engineering
• Neurosurgery

Background:

• Brain electrical stimulation is a growing treatment for neurological disorders.
• Existing technologies vary in specificity, coverage, and invasiveness.
• Supracortical microstimulation (SCMS) provides spatially precise activation on the cortical surface without disrupting cortical integrity.

Purpose of the Study:

• To comprehensively review in vivo experiments involving SCMS.
• To summarize recent advances in SCMS technology.
• To guide the development of clinically translatable supracortical microelectrodes.

Main Methods:

• Literature review of in vivo SCMS experiments.
• Analysis of recent technological advancements in SCMS.
• Identification of knowledge gaps in SCMS biophysical effects.

Main Results:

• SCMS offers a balance between specificity and invasiveness.
• Existing research has not been comprehensively summarized.
• Gaps exist in understanding SCMS biophysical effects and preclinical validation.

Conclusions:

• Further research into SCMS electrochemical properties is needed.
• Preclinical studies in nonhuman primates are crucial for clinical translation.
• Advancing SCMS can lead to innovative treatments for neurological disorders.