This article is over a year and a half old, but I’ve only just come across it.
Interesting for my research into phenomenology and videogames.
Four months after the operation, I watched Caplan take Nagle through a typical training session. He tracked Nagle’s mental activity on two large monitors, one of which displayed a graph of red and green spiking lines. Each spike represented the firing of clusters of neurons. As Nagle performed specific actions in his mind’s eye – move arm left, move arm up – the electrodes picked up the patterns of nearby neuron groups. Then BrainGate amplified and recorded the corresponding electrical activity. Over dozens of trials the computer built a filter that associated specific neural patterns with certain movements. Later, when Nagle again mentally pictured the motions, the computer translated the signals to guide a cursor.