Wireless implantable brain SoC reads neural signals, stimulates

November 26, 2020 //By Nick Flaherty
Wireless implantable brain SoC reads neural signals, stimulates
Researchers at North Carolina State University have developed a system-on-chip (SoC) that is powered wirelessly and can be surgically implanted to read neural signals and stimulate the brain with both light and electrical current.

A team at the ASSIST Center at North Carolina State University has designed the fully wireless chip with an integrated receiver coil so that it can be used as a brain implant. It is also capable of sending and receiving data. The Center was set up to create self-powered wearables capable of long-term multi-modal sensing without having to replace or charge batteries.

"Our goal was to create a research tool that can be used to help us better understand the behaviour of different regions of the brain, particularly in response to various forms of neural stimulation," says Yaoyao Jia, corresponding author of a paper on the work and an assistant professor of electrical and computer engineering at North Carolina State University. "This tool will help us answer fundamental questions that could then pave the way for advances in addressing neurological disorders such as Alzheimer's or Parkinson's disease."

The new technology has two features that set it apart from the previous state of the art.

First, it is fully wireless. Researchers can power the 5- × 3-mm chip, which has an integrated power receiver coil, by applying an electromagnetic field. For example, in testing the researchers did with lab rats, the electromagnetic field surrounded each rat’s cage – so the device was fully powered regardless of what the rat was doing. The chip is also capable of sending and receiving information wirelessly.

The second feature is that the chip is trimodal, meaning that it can perform three tasks.

Picture: 
Yaoyao Jia, NC State University

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