Three areas of the brain are active in this network, and they include the visual cortex, temporoparietal junction, and the ventral frontal cortex. These areas respond when behaviorally relevant stimuli occur unexpectedly.[1] The ventral attention network may also become inhibited during focused attention in which top down processing is being used, such as when one is visually searching for something. This response may prevent goal driven attention from being distracted by non-relevant stimuli.