An implantable wireless neural interface for recording cortical circuit dynamics in moving primates

Area of Science:

• Biomedical Engineering
• Neuroscience
• Implantable Devices

Background:

• Clinical translation of neural interface technology is crucial for individuals with neurological conditions.
• Existing systems require chronic safety, durability, and effectiveness for widespread adoption.

Purpose of the Study:

• To design and implement a wireless, implantable neural interface microsystem for clinical applications.
• To evaluate the safety and efficacy of this device in animal models.

Main Methods:

• A hermetically sealed titanium-housed microsystem with a 100-element microelectrode array was developed.
• Broadband neural signals were amplified, multiplexed, digitized, and wirelessly transmitted (24 Mbps).
• The system was powered by a rechargeable Li-ion battery with wireless inductive charging.

Main Results:

• The wireless implant demonstrated electrical stability and safety over one year in swine and non-human primate models.
• The device effectively captured and transmitted broadband neural data.
• Neural population dynamics associated with motor activity were successfully decoded from the recorded data.

Conclusions:

• An implantable wireless broadband neural recording device has been successfully developed and validated in animal models.
• This technology offers potential for advancing human neuroprostheses and brain research.
• The system enables mobile patient use and broader diagnosis of neurological conditions.