This project will use neurobiological techniques to understand the mechanisms of face processing in the primate brain. Lesions in a particular part of the human brain can cause an inability to recognize familiar faces. Neurons from this brain region in monkeys have been shown to selectively activate by visual images of faces. Brain imaging studies in both humans and monkeys have demonstrated face-selective regions. However, the neural circuitry underlying face selectivity remains unclear. To clarify this, the functional connectivity, which can reveal neural circuits, in these face-selective regions will be studied in rhesus monkeys in the resting, awake state using functional magnetic resonance imaging (fMRI) scans. The results of this research will make a significant contribution to the understanding of the neural processing of facial stimuli with emotional content.