Experiments could lead to ways of melding minds with machines
To lay the groundwork for a nerve-electronic hybrid, graduate student Minrui Yu of the University of Wisconsin–Madison and his colleagues created tubes of layered silicon and germanium, materials that could insulate electric signals sent by a nerve cell. The tubes were various sizes and shapes and big enough for a nerve cell’s extensions to crawl through but too small for the cell’s main body to get inside.
“They seem to like the tubes,” says biomedical engineer Justin Williams, who led the research. The approach offers a way to create elaborate networks with precise geometries, says Williams. “Neurons left to their own devices will kind of glom on to one another or connect randomly to other cells, neither of which is a good model for how neurons work.”
Eventually, the arrangement may make it easier to couple living cells with technology on a larger scale, but getting there is no small task, says neuroengineer Ravi Bellamkonda of the Georgia Institute of Technology in Atlanta.