Fig 4 shows time-frequency plots and topographic head maps for the younger and older male subjects. Topographically, theta power during loss condition showed an anterior focus while the gain condition had a posterior focus in younger subjects and a wider activation involving frontal-central-parietal regions was seen in older subjects. HR subjects showed significantly lower theta power than LR individuals. Overall, the older subjects have shown lower theta power compared to their younger counterparts in each subgroup.
