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CHIPS Articles: DARPA neurotechnology program aims to connect a human brain to electronic devices

DARPA neurotechnology program aims to connect a human brain to electronic devices
By CHIPS Magazine - January-March 2018
The U.S. government agency that changed the world with the launch of the internet in the ‘90s is going to revolutionize how we communicate with electronic devices. DARPA now seeks to achieve high levels of brain-system communications without surgery, in its new program, Next-Generation Nonsurgical Neurotechnology (N3). For the last 20 years, DARPA has been at the forefront of this research working with the international biomedical research community which has demonstrated increasingly sophisticated ways to allow a person's brain to communicate with a device, allowing breakthroughs aimed at improving quality of life, such as access to computers and the internet, and more recently control of a prosthetic limb.

The state-of-the-art in brain-system communications uses invasive techniques that allow precise, high-quality connections to specific neurons or groups of neurons to assist patients with brain injury and other illnesses. However, these techniques are not appropriate for able-bodied people, according to a DARPA release.

“DARPA created N3 to pursue a path to a safe, portable neural interface system capable of reading from and writing to multiple points in the brain at once,” said Dr. Al Emondi, program manager in DARPA’s Biological Technologies Office (BTO). “High-resolution, nonsurgical neurotechnology has been elusive, but thanks to recent advances in biomedical engineering, neuroscience, synthetic biology, and nanotechnology, we now believe the goal is attainable.”

Noninvasive neurotechnologies, such as the electroencephalogram and transcranial direct current stimulation already exist, but offer nowhere near the precision, signal resolution, and portability required for advanced applications by people working in real-world settings, DARPA said. Potential N3 researchers will have to overcome many scientific and engineering challenges to avoid the limitations, but by far the biggest obstacle will be overcoming the complex physics of scattering and weakening signals as they pass through skin, skull and brain tissue.

“We’re asking multidisciplinary teams of researchers to construct approaches that enable precise interaction with very small areas of the brain, without sacrificing signal resolution or introducing unacceptable latency into the N3 system,” Emondi said. The only technologies that will be considered in N3 must have a viable path toward eventual use in healthy human subjects.

DARPA said if early program deliverables solve the physics challenges, along with the barriers of crosstalk and low signal-to-noise ratio, subsequent program goals would include developing algorithms for decoding and encoding neural signals, integrating sensing and stimulation subcomponents into a single device, evaluating the safety and efficacy of the system in animal models, and ultimately testing the technology with human volunteers.

The four-year N3 effort is expected to conclude with a demonstration of a bidirectional system being used in a defense-relevant task that could include human-machine interactions with unmanned aerial vehicles, active cyber defense systems, or other properly instrumented Department of Defense systems. If successful, N3 technology could ultimately advance improved human-machine interaction, such as partnering humans with computer systems to keep pace with the anticipated speed and complexity of future military missions.

“Smart systems will significantly impact how our troops operate in the future, and now is the time to be thinking about what human-machine teaming will actually look like and how it might be accomplished,” Emondi said. “If we put the best scientists on this problem, we will disrupt current neural interface approaches and open the door to practical, high-performance interfaces.”

From the beginning of the N3 program, federal regulators have helped researchers better understand regulatory guidance as they begin to develop technologies. Later in the program, regulators will again guide strategies for submitting applications, as needed, for Investigational Device Exemptions and Investigational New Drugs.

DARPA is mindful of the ethical, legal and social dimensions of more ubiquitous neurotechnology and how it might affect not only military operations, but also society at large. Independent legal and ethical experts advised the agency as the N3 program was being formed, and will continue to help DARPA think through new scenarios that arise as N3 technologies take shape. Further, regulators will also help to broaden the discussion about how to maximize societal benefits from the new technologies.

DARPA is hosting a Proposers Day on April 3, 2018, in Arlington, Virginia, to provide more information about N3. Proposers to N3 must describe mechanisms for identifying and addressing the potential ethical and legal implications of their work. As the research advances, published N3 results will further facilitate broad consideration of emerging technologies, DARPA noted. For additional information, including registration, visit:

Full program details will be included in a forthcoming Broad Agency Announcement to be published to the Federal Business Opportunities website.

DARPA's Next-Generation Nonsurgical Neurotechnology program aims to develop a high-resolution, portable neural interface system capable of reading from and writing to multiple points in the brain at once. Such a noninvasive system would extend the power of advanced neurotechnology to able-bodied individuals and could support future Department of Defense efforts to improve human-machine teaming.
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