American Bill Kochevar is believed to be the first person in the world with quadriplegia to have arm and hand movement restored by two kinds of implant.
Electrodes under his skull record the activity of brain neurons to generate signals that tell another device to stimulate muscles in the paralysed limb.
Mr Kochevar, 56, from Cleveland, Ohio, said: “For somebody who’s been injured eight years and couldn’t move, being able to move just that little bit is awesome to me. It’s better than I thought it would be.”
A report on his progress appears in the latest issue of The Lancet medical journal.
Principal investigator Dr Bob Kirsch, from Case Western Reserve University in the US, said: “He’s really breaking ground for the spinal cord injury community. This is a major step toward restoring some independence.”
Mr Kochevar is a participant in the on-going BrainGate2 trial looking at the safety and feasibility of using brain-computer interface systems to help people paralysed by spinal injuries.
Other BrainGate research has demonstrated the “mind control” of cursors on computer screens and robotic arms.