IoT-enabled wireless neural implant for chronic, programmable neuropharmacology and optogenetics

Area of Science:

• Neuroscience
• Biomedical Engineering
• Pharmacology

Background:

• Wireless in vivo neuropharmacology and optogenetics are crucial for linking molecular signaling, neural populations, and behavior in freely moving animals.
• Existing wireless systems face challenges including imprecise dosing, contamination, nonrefillable reservoirs, and experimenter presence altering results.

Purpose of the Study:

• To introduce a remotely actuated and programmable implant for drug delivery and optical stimulation (RAPIDO).
• To overcome limitations of existing systems by enabling precise, refillable, and observer-free neuromodulation.

Main Methods:

• Developed RAPIDO, a miniaturized implant integrating a refillable, backflow-free fluidic module with a microscale inorganic light-emitting diode probe.
• Utilized a replaceable cartridge with a unidirectional valve for contamination-free dosing and an electrochemical pump for controlled flow rates.
• Implemented dual wireless modes: smartphone control for interactive experiments and internet connectivity for remote, scheduled operation.

Main Results:

• Demonstrated wireless pharmacological modulation of locomotor behavior in freely behaving rodents.
• Achieved independent optogenetic manipulation of intracellular signaling during cocaine conditioning.
• Successfully enabled repeated, precise, and observer-free neuromodulation.

Conclusions:

• RAPIDO establishes a foundation for chronic multimodal neuromodulation in neuroscience research.
• The platform supports long-term circuit studies across distributed laboratories, enhancing experimental reproducibility and scope.