Brain imaging refers to the construction of pictures of the anatomy and functioning of intact brains through such techniques as computerized axial tomography (CAT, or CT), positron emission tomography (PET ), magnetic resonance imaging (MRI), or functional magnetic resonance imaging (fMRI).

Brain imaging are procedures that make it possible to visualize areas of the human brain that are activated by different types of stimuli, tasks, or behaviors . The two (2) most common techniques used in perception research are positron emission tomography (PET) and functional magnetic resonance imaging (fMRI).

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