A miniaturized neuroprosthesis suitable for implantation into the brain

Area of Science:

• Biomedical Engineering
• Neuroscience
• Materials Science

Background:

• Current neuroprosthetic systems often require external wiring for signal and power transmission.
• The development of implantable devices is crucial for long-term neural interfacing and control applications.

Purpose of the Study:

• To present research on a miniaturized, implantable neuroprosthesis for decoding neural signals.
• To enable wireless control of artificial or paralyzed limbs through brain-computer interfaces.

Main Methods:

• Heterogeneous integration of a 100-element microelectromechanical system (MEMS) electrode array.
• Utilizing front-end complementary metal-oxide-semiconductor (CMOS) integrated circuits for neural signal processing (preamplification, filtering, multiplexing, analog-to-digital conversion).
• Incorporating a second CMOS integrated circuit for wireless data transmission and power conditioning.

Main Results:

• Demonstrated a miniaturized neuroprosthetic system meeting strict size and power constraints.
• Achieved front-end preamplifier channels fitting within a 400 x 400-microm pitch.
• Ensured power dissipation resulted in <1°C temperature rise in surrounding brain tissue.
• Described measured performance of initial micropower, low-noise CMOS preamplifiers.

Conclusions:

• The developed neuroprosthesis successfully integrates MEMS and CMOS technologies for wireless neural data acquisition.
• This technology paves the way for fully implantable neuroprosthetic systems, eliminating external wiring.
• The research advances the potential for restoring motor function in individuals with paralysis.