"[Gert-Jan] Oskam... said that these stimulation technologies had left him feeling that there was something foreign about the locomotion..."

"... an alien distance between his mind and body. The new interface changed this, he said: 'The stimulation before was controlling me, and now I’m controlling the stimulation.' In the new study, the brain-spine interface, as the researchers called it, took advantage of an artificial intelligence thought decoder to read Mr. Oskam’s intentions — detectable as electrical signals in his brain — and match them to muscle movements. The etiology of natural movement, from thought to intention to action, was preserved. The only addition... was the digital bridge spanning the injured parts of the spine.... 'It raises interesting questions about autonomy, and the source of commands. You’re continuing to blur the philosophical boundary between what’s the brain and what’s the technology.'"

 From "A Paralyzed Man Can Walk Naturally Again With Brain and Spine Implants" (NYT).