High-Density, Conformable Conducting Polymer-Based Implantable Neural Probes for the Developing Brain.

Area of Science:

• Neuroscience
• Bioelectronics
• Biomedical Engineering

Background:

• Pediatric neurologic and neuropsychiatric disorders highlight the need for tools to study the developing brain.
• Conventional neural interfaces are unsuitable for immature neural tissue due to size, fragility, and lack of skull support, causing damage and data gaps.

Purpose of the Study:

• To design and evaluate conformable, implantable neural probes for precise monitoring of the developing mouse brain.
• To overcome the limitations of rigid devices in immature neural tissue and enable high-fidelity neurophysiologic recordings.

Main Methods:

• Development of conducting polymer-based probes (NeuroShanks) for flexible implantation.
• Testing probe performance in the developing mouse brain for signal acquisition and tissue compatibility.
• Evaluation of signal stability and recording capabilities (local field potentials, action potentials) across behavioral states.

Main Results:

• NeuroShanks enabled precise targeting and implantation in the developing mouse brain without rigid support structures.
• High spatiotemporal resolution neurophysiologic activity was acquired from superficial and deep brain regions without tissue disruption.
• Probes demonstrated mechanical stability and reliable signal monitoring, including individual action potentials.

Conclusions:

• The developed NeuroShanks are suitable for monitoring the developing brain in animal models, addressing a critical gap in neuroscience research.
• Organic bioelectronics offer a promising approach for studying developmental neuroscience and have translational potential for pediatric neurophysiologic recording.