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Researchers at Princeton University have created a three-dimensional neural network device that combines living brain cells and advanced embedded electronics. According to a recent press release, this 3D bioelectronic computer was programmed to differentiate patterns using computational techniques.
Basically, we are looking at living brain cells performing computational tasks outside the brain, using embedded electronics. This is not the first time scientists have used brain cells to perform computation. In previous attempts, scientists cultivated 2D cultures in petri dishes or 3D clusters, probing and monitoring activity from the outside.
The Princeton research took a different approach. To build the device, the team created a 3D mesh of microscopic wires and electrodes supported by a thin layer of epoxy. They then cultured tens of thousands of neurons into a vast 3D network that can perform computation, using the mesh as a scaffold.
You may like Human brain cells set to power two new data centers, thanks to 'body-in-the-box' CL1 Researchers train living rat neurons to perform real-time AI computations Living neurons integrated into modern AI processing, claims SF startup According to the researchers, this new approach “enabled them to record and stimulate the neurons' electrical activity at a much finer scale than past approaches”. Over the course of six months, they observed how the network developed, tested techniques to reinforce or weaken links between key neurons, and eventually trained an algorithm to identify recurring pulse patterns.
To test the system, the researchers presented two distinct patterns in separate experiments, and it successfully differentiated the patterns in both cases. The team aims to progressively scale the device to perform increasingly complex tasks.
According to the paper's first author, Kumar Mritunjay, a postdoctoral researcher in electrical and computer engineering, the technology could "not only help uncover the computing secrets of the brain but can also assist in understanding and possibly treating neurological diseases.”
The original aim of the research was to investigate fundamental problems in neuroscience by studying the activities of living brain cells. That aim remains. However, the researchers realized that it could also play a role in solving one of AI’s key bottlenecks: power consumption.
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- https://www.tomshardware.com/tech-industry/big-tech/new-3d-device-computes-using-living-brain-cells-bioelectronic-device-uses-3d-electronic-mesh-design-paired-with-living-tissue#main
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