brainwaves

[StuMeikle]

here's a question:

if I were to watch someone's brain using PET imagining , or some form of
imaging, and that person was to (eg) move their arms, I guess part of the
brain would 'light up' when they did this. if they then thought about
moving their arms, but did not actually move them, would this same area
light up, or is thinking and imagining completely separate from the actual
doing ??

stuart