Functional imaging has been used by several researchers to find the locus of activation for a variety of psychological functions. For example, studies attempting frontal-lobe function have found activation in the dorsalateral area for self-ordering (Petrides, 2000), orbitofrontal area for encoding visual information ( Frey & Petrides, 2000) and encoding unpleasant auditory information ( Frey et al., 2000), inferior prefrontal area for f acial expression or recognition or both ( Idaka et al., 2001), and medial and ventrolateral areas for a utobiographic memory (Svoboda et al., 2006). Given below are the fMRI images from a study by Borg et al. (2006). In this study fMRI was used to map the brain during moral judgment tasks. The red regions were activated more in moral scenarios whereas regions in blue were activated more in nonmoral scenarios.

The advantage of fMRI over PET is its better resolution besides being extremely sensitive to blood flow changes. This allows detection of even small changes in the brain and is therefore used by many researchers in the area of human behaviour.