According to a group of German scientists every single person is distinguished from others by their own personal brain structure and behavior.
They found that the adult brain continues to grow with the challenges that it faces; its changes are linked to the development of personality and behavior. In order to shed light on the question why even identical twins don’t resemble each other perfectly even when they grew up together.
Though the animals in the study, mice of course, that were genetically identical, shared the same life space, they increasingly differed in their activity levels. These differences were associated with differences in the generation of new neurons in the hippocampus, a region of the brain that supports learning and memory. Animals that explored the environment to a greater degree also grew more new neurons than animals that were more passive.
With this study, the authors show for the first time that personal experiences and ensuing behaviour contribute to the „individualization of the brain.“