Scientists hack fly brains to make them remote controlledResearchers at Rice University have shown how they can hack the brains of fruit flies to make them remote controlled. The flies performed a specific action within a second of a command being sent to certain neurons in their brain.
The team started by genetically engineering the flies so that they expressed a certain heat-sensitive ion channel in some of their neurons. When this channel sensed heat, it would activate the neuron – in this case, that neuron caused the fly to spread its wings, which is a gesture they often use during mating.
The heat trigger came in the form of iron oxide nanoparticles injected into the insects’ brains. When a magnetic field is switched on nearby, those particles heat up, causing the neurons to fire and the fly to adopt the spread-wing pose.
To test the system, the researchers kept these engineered flies in a small enclosure atop a magnetic coil, and watched them with overhead cameras. And sure enough, when the magnetic field was switched on, the flies spread their wings within about half a second.
