News : Monkey brain operates machine - Robot

Scientists have used the brain signals from a monkey to drive a robotic arm.

As the animal stuck out its hand to pick up some food off a tray, an artificial neural system linked into the animal's head mimicked the activity in the mechanical limb.


"It was an amazing sight to see the robot in my lab move, knowing that it was being driven by signals from a monkey brain"

Mandayam Srinivasan, MIT

The system was even used to remotely control another robot arm 950 kilometres (600 miles) away in a different lab.

This is not the first time that a device has been operated by "brain power" alone, but the experiment marks a significant step forward in sophistication.

It holds out the prospect that, one day, paralysed patients might be able to command the movement of prosthetic limbs that have been "wired" into their brains.

Commenting on the research, Sandro Mussa-Ivaldi, of the Northwestern University Medical School, and the Rehabilitation Institute of Chicago, Illinois, US, said: "The idea of driving robotic limbs with what effectively amounts to the mere power of thought was once in the realm of science fiction. But this goal is edging closer to reality."

Miguel Nicolelis, his monkey and the robotic arm

Brain study

In previous research, it has been shown that a rat wired into an artificial neural system can make a robotic water feeder move just by willing it.

"The idea of driving robotic limbs with what effectively amounts to the mere power of thought was once in the realm of science fiction"
Sandro Mussa-Ivaldi, Rehabilitation Institute of Chicago

But the latest work sets new benchmarks because it shows how to process more neural information at a faster speed to produce more sophisticated robotic movements. That the system can be made to work using a primate is also an important proof of principle.

Miguel Nicolelis told BBC News Online that people would obviously focus on possible future applications for quadriplegics but he said the system also offered a new way to probe the workings of the brain.

"We have designed a new paradigm to study how the brain processes information," he said.

"Until fairly recently, we tried to understand the brain by looking at one neuron at a time, but we all know the brain works in a parallel mode requiring the activation of huge numbers of cells to produce any behaviour.

"So the implementation of this technique for recording up to a 100 neurons in primates is a big deal for science."