Schema of cortical loci of multisensory processes. The schema is depicted on a left hemisphere, with the occipital lobe on the right side of the image and the frontal lobe on the left side. Primary visual (V1), auditory (A1), and somatosensory (S1) cortices are indicated by the red, green, and blue blobs, respectively. The correspondingly coloured arrows depict a schema where interactions are restricted to higher-level association cortices, such as the prefrontal cortices (PFC) and superior temporal sulcus (STS) (indicated by white disks). The black lines depict a schema where interactions occur directly between low-level cortices. There is now evidence in support of both schemas. Therefore, multisensory processes undoubtedly involve a dynamic combination of these schemas, which emerge as a consequence of both sensory stimulus- and experience-dependent processes.