Final answer:
The parietal lobe interacts with somatosensory areas and influences frontal lobe activity to integrate visual information for motion perception and guide movements, making it the region responsible for integrating visual information to reach a perceptual decision related to motion.
Step-by-step explanation:
The cortical brain region responsible for integrating visual information to reach a perceptual decision and for neural responses to motion is part of a larger system in the brain involving multiple lobes. Within the visual cortical areas, two streams process visual information: the ventral stream and the dorsal stream. The ventral stream is associated with the identification of visual stimuli and the temporal lobe, which plays a role in forming long-term memories.
The dorsal stream, on the other hand, involves locating objects in space and guiding bodily movements in response to visual inputs. This stream involves the parietal lobe interacting with somatosensory cortical areas important for our perception of the body and its movements, and influencing frontal lobe activity where motor functions originate. Therefore, for integrating visual information related to motion and guiding bodily movements, the parietal lobe (option 3) is primarily responsible.