MAPPING OF CORTICAL AREAS INVOLVED IN COLOR-VISION IN NONHUMAN-PRIMATES

Positron emission tomography (PET) was used to measure changes in the regional cerebral blood flow (rCBF) of rhesus monkeys performing visua l discrimination tasks. In comparison with both position and brightnes s discrimination tasks, the color discrimination task activated the po sterior inferior temporal cortex and a ventromedial occipital region, which is located along the anterior one-third of the calcarine sulcus, In contrast, the position task activated the middle temporal area and intraparietal cortex as compared with the color task, These results c onfirm the segregation of visual pathways and delineate the visual are as involved in color vision, This approach might bridge the gap betwee n invasive studies in animals and functional imaging studies in humans . (C) 1997 Elsevier Science Ireland Ltd.