Alva Noë in Cosmos And Culture
Not so fast. A functional brain image such as those produced by PET and fMRI no more captures the brain in action than a graph illustrating the percentage of the population who go to church on Sunday captures the people in the act of worship. Brain scan images are graphical renderings of what we hypothesize is going on in the head. There’s nothing wrong with such images. In fact, they are valuable tools for carrying on scientific study. But they are not pictures of our brains in action, and so they are positively not images of our minds at work.