Video game technology has helped a woman left paralysed after a stroke speak again, researchers report.Edinburgh-based Speech Graphics, and American researchers at UC San Francisco (UCSF) and UC Berkeley, say they have created the world's first brain-computer interface that electronically produces speech and facial expression from brain signals.The development opens up a way to restore natural communication for those who cannot speak.

Video game technology has helped a woman left paralysed after a stroke speak again, researchers report.Edinburgh-based Speech Graphics, and American researchers at UC San Francisco (UCSF) and UC Berkeley, say they have created the world's first brain-computer interface that electronically produces speech and facial expression from brain signals.The development opens up a way to restore natural communication for those who cannot speak.