In experiments, monkeys were able to navigate their way around a lab just by thinking about moving toward a goal – in this case, a bowl of grapes.

A computer translates their brain activity into real time operation of the wheelchair, offering hope of restoring mobility for severely paralysed patients.

The wireless brain machine interface (BMI) works by picking up pulses of electricity emitted by electrodes implanted inside the cortex, a brain area responsible for movement and sensation.

The robotic chair could revolutionise life for those with severe disabilities who are unable to use a conventional joystick.

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