Paralysed woman controls robot arm with mind

A paralysed woman in the US has been able to use her mind to control a robotic arm, thanks to nearly 100 electrodes implanted in her brain.

Cathy Hutchinson is unable to move her limbs or speak after a severe stroke 15 years ago, but was able to steer the robotic arm using her brain activity to lift up a cup of coffee and bring it to her lips.

“We’ll never forget that smile,” neuroengineer Leigh Hochberg said.

Ms Hutchinson and a paralaysed man known as Bob had tiny recording devices implanted into the motor cortex of their brains by neuroscientists at Brown University in Rhode Island.

The implants pick up neural signals which are then converted into digital commands.

The latest development follows a trial in which participants were able to move a cursor on a computer screen just with the power of their mind.

The technology offers hope to those suffering severe paralysis but scientists warn there is still a lot of work to go.

Source: Nature. Author: Nick Pearson. Approving editor: Fiona Willan.

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