sentences:  Falk observed that these studies exclude the internal brain structures that cannot be described by paleoneurologists because they do not show up on endocasts.These parts of the brain also evolved, and they are extremely important for processing memories, gut-level feelings, and social interactions in ways that set humans apart from other animals.In 2018, Falk and colleagues published an "in vivo" MRI study of the cerebral cortices of eight adult chimpanzees in which they identified sulcal patterns and compared them to those known from australopithecines and "Homo naledi".