A new device has been created that can analyse the brainwaves of non-verbal, paralysed patients and turn them into sentences on a computer screen in real time.
The 'mind-reading' machine is capable of decoding brain activity as a person silently attempts to spell out words phonetically to create full sentences.
Experts say their neuroprosthesis speech device has the potential to restore communication to people who cannot speak or type due to paralysis.
Previous research had shown that a similar system was able to decode up to 50 words.
However, this was limited to a specific vocabulary and the participant had to attempt to speak the words out loud, which required significant effort, given their paralysis.