Exploring the intricate link between the brain and gut.

MIT researchers have developed an electronic interface using specialized fibers embedded with sensors and light sources for optogenetic stimulation, allowing them to manipulate neural circuits connecting the brain and gut in mice. The technology has provided new insights into the complex relationship between these two vital organs, which has long been recognized but poorly understood. The fibers, as thin as human hair, can be inserted into the gut and other organs of interest, and are embedded with electrodes, temperature sensors, light-emitting devices, and microfluidic channels for drug delivery.