Brain Wave Machine

The type that has a picture of your brain and your lights in top in the certain colors to show to which section of your brain replies to something.

The machine that shows vague to the brain is an electroencephalorgram, or EEG. the the one with the pictures that you refer yourself to is I believe a functional MRI.

It or could be a MRI or a fMRI (the functional MRI).

It could be also a sweeping of FAVORITE ANIMAL

There are evoked expositions potentielles as that. You probably refer yourself to a FAVORITE ANIMAL (the Tomographie of Emission of Positron) sweeping, that can show metabolism.
More of sectors lights in top when you remain than while saying the truth, for example. Resolve a problem of maths -- the music of left hedmispha¨re-edcoutant- the just brain (unless you are musical, then you listen of a manner criticizes, -- the left brain)