Early interfaced neural activity from chronic amputated nerves.

Area of Science:

• Biomedical Engineering
• Neuroscience
• Regenerative Medicine

Background:

• Directly interfacing peripheral nerves with robotic prosthetics aims for natural motor control and sensory feedback in amputees.
• Current multi-electrode arrays face limitations like inflammation and tissue damage, hindering long-term use.

Purpose of the Study:

• To investigate regenerative multi-electrode arrays for improved neural interfacing after nerve amputation.
• To assess the feasibility of early and stable neural recordings with non-obstructive electrode designs.

Main Methods:

• Developed and implanted non-obstructive, regenerative multi-electrode arrays in the path of regenerating peripheral nerve fibers.
• Recorded neural activity (action potentials) and assessed tissue response (inflammation) over time.

Main Results:

• Achieved early neural recordings (as early as 8 days post-implantation) with high signal-to-noise ratio.
• Maintained stable recordings for up to 3 months in some cases.
• Observed minimal inflammation at the nerve tissue-metal electrode interface.

Conclusions:

• Regenerative multi-electrode arrays offer a viable alternative for early and stable neural interfacing from amputated peripheral nerves.
• Open-design electrode arrays can facilitate enhanced long-term integration with robotic prosthetic devices.
• This approach may advance the development of robotic prosthetics with full neural control and sensory feedback capabilities.