>>20247350underdeveloped frontotemporal cortices combined with lower overall cranial size and lower neuronal density
that is to say, smaller, less dense brains, with less development in the regions typically associated with higher-order cognitive functions: speech and personality expression, language comprehension, working memory, visual memory, risk assessment, long-term planning, decision making, understanding cause-and-effect, and the ability to suppress primal impulses originating in the limbic system to moderate one's behaviour in social contexts
amongst other things
