Neurobiology
ADS is neurodevelopmental, meaning that there are differences in the pattern of brain development. For example, early brain overgrowth has been documented in the first two years of life and, in later development, there are clear differences in the function and structure of the ‘empathy circuit’ of the brain (amygdala, ventromedial prefrontal cortex, temporo-parietal junction, orbitofrontal cortex, anterior cingulate, and other related brain regions)