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Doctors in Switzerland have used a brain-reading device to hold simple conversations with "locked-in" patients, who are too disabled to communicate. In 2010 Kate Allatt became 'locked in' after suffering a stroke - she's now a motivational speaker, stroke activist and author. Her friends helped to ‘unlock’ her by creating a system of communication. She said: “They realised I wasn’t vegetative, and I was able to signal with my eyelids. They unlocked me by devising their own letterboard, one blink for no, two for yes.” “Being unlocked was like all your birthdays, Christmases and holding your baby in your arms at once – it was phenomenal,” added Kate. This clip is originally from 5 live Breakfast on Wednesday 1 February 2017.