By thinking
A brain implant picked up on the letters a paralysed man imagined writing. (Stock, Getty Images)
A paralysed man was able to write after two revolutionary chips were implanted into his brain.
The unnamed 65-year-old cannot move from the neck down as a result of a spinal cord injury in 2007. To help him communicate, scientists from Stanford University implanted so-called brain-computer interfaces (BCIs) into the left side of his vital organ, where hand movements are regulated.
These interfaces detected signals given out by the man's nerve cells when he imagined writing certain letters.
