These structures form a ring or a border around diencephalon. There is no general agreement on the exact composition of the limbic lobe. Limbic system is found on the medial surface of each hemisphere. Cingulate gyrus surrounds the corpus callosum on its upper edge in the frontal and parietal lobes. Disorders of cingulate gyrus are associated with anxiety and obsessive-compulsive behavior.
Anxiety is a powerful and sometimes useful emotion for self-preservation.
Hippocampus is located beneath the parahippocampal gyrus. Parahippocampal gyrus is a posterior and inferior continuation of the cingulate gyrus and is located in the temporal lobe. Hippocampus and the parahippocampal gyrus have an important role to play in recent memory and learning. Schizophrenia is a form of psychosis characterized by severe personality, behavior and cognitive disorders. In many people with schizophrenia, pathologies involving the hippocampus and the parahippocampal gyrus have been noted.