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A Procedure for Implanting Organized Arrays of Microwires for Single-unit Recordings in Awake, Behaving Animals

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A fully implantable 96-channel neural data acquisition system.

Michael Rizk¹, Chad A Bossetti, Thomas A Jochum

¹Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA. mr38@duke.edu

Journal of Neural Engineering

|March 4, 2009

Summary

A new fully implantable neural data acquisition system enables wireless communication and power for brain-machine interfaces. This 96-channel device successfully recorded and transmitted neural data in sheep, a key step for clinical viability.

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Surgical Implantation of Chronic Neural Electrodes for Recording Single Unit Activity and Electrocorticographic Signals

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Published on: February 24, 2012

Area of Science:

Biomedical Engineering
Neuroscience
Implantable Devices

Background:

Clinical brain-machine interfaces require wireless, fully implantable neural data acquisition systems.
Existing systems often rely on transcutaneous wires, posing infection risks and limiting long-term use.

Purpose of the Study:

To develop and demonstrate a 96-channel, fully implantable neural data acquisition system.
To enable wireless data transmission and power supply for brain-machine interfaces.

Main Methods:

Designed a 96-channel implantable system with integrated spike detection and extraction.
Utilized wireless inductive coupling for power delivery.
Achieved wireless data transmission to an external unit.
Conducted acute implantation studies in sheep.

Main Results:

Successfully recorded, processed, and transmitted neural data wirelessly.
Demonstrated bidirectional communication up to 2 meters.
Confirmed seamless integration with a brain-machine interface.

Conclusions:

The developed system represents a significant advancement towards clinically viable brain-machine interfaces.
Wireless power and data transmission overcome critical barriers for implantable neural devices.
High channel count and robust performance pave the way for future neuroprosthetic applications.