Hippocampus anatomy These limbic structures include the hippocampus, cingulate cortex, olfactory cortex, and amygdala. Paul MacLean once suggested, as part of his triune brain theory, that the limbic structures constitute the neural basis of emotion. While most neuroscientists no longer believe in the concept of a unified "limbic system", these regions are highly interconnected and do interact with one another. Starting at the dentate gyrus and working inward along the S-curve of the hippocampus means traversing a series of narrow zones. The first of these, the dentate gyrus (DG), is actually a separate structure, a tightly packed layer of small granule cells
Fun at least for a little while, to never-never land and enjoy it." Some scientists have identified areas of the brain associated with the perception of novelty, which are stimulated when faced with "unusual or surprising circumstances". Information is initially received in the hippocampus, the site of long-term memory consolidation, where the brain attempts to match the new information with recognizable patterns stored in long-term memory. When it is unable to do this, the brain releases dopamine, a chemical which stimulates the amygdala, the site of emotion, and creates a pleasurable feeling that is associated with the new memory. In other