A brain scan can predict weight gain and sexual activity, a new study suggests. Using magnetic resonance imaging, scientists monitored the activity of an area in the brain called the nucleus accumbens, perceived as the reward center. This brain center is responsible for the perception of food that is liked. Its stimulation provokes the sensation of appetite and provokes people to continue eating even when they feel full. The nucleus accumbens functions similarly in relation to sexual desire and activity. During a tomographic brain scan, volunteers were shown pictures of various appetizing foods and sexy faces. The researchers recorded preliminary data on the volunteers’ body mass gain and sexual desire, monitoring the frequency and response of the nucleus accumbens. Six months after the start of the study, the scientists found that volunteers whose reward center responded more strongly to the sight of appetizing foods had gained several pounds in recent months, unlike people whose center did not report a strong response. Sexual activity and libido in these people also increased significantly, the researchers added. They believe the study could help control appetite or treat some underlying sexual problems. The study was published in the journal Neuroscience.