Brain control monkey

I don't know whether they plugged electrodes directly into the poor monkey's brain or they were applied on the scalp like an EEG. I'm hoping the later. In any case it's a cool clip from a british science documentary. Described as:

"In a ground-breaking 5 year experiment, scientists hook up a robotic arm controlled by a computer game to a monkey's brain. In training the monkey to move the arm by 'playing' the game with a joystick. Researchers wanted to learn more about the output of the brain and the individual brain-cell signals. However the monkey was about to do something that would make history and change the lives of those involved."