<span>The limbic system, relevant to memory and emotion, is an interesting subject of study in healthy and diseased individuals. It consists of a network of gray matter structures interconnected by white matter fibers. Although gray matter components of this system have been studied by using MR imaging, the connecting fibers have not been analyzed to the same degree. Cerebrospinal fluid (CSF) signal intensity contamination of the fornix and cingulum, the 2 major white matter tracts of the limbic system, can alter diffusion-tensor imaging (DTI) measurements and affect tractography. We investigated the effect of CSF signal intensity suppression on fiber tracking of the limbic connections and characterized the diffusion properties of these structures in healthy volunteers.</span>
Its too expensive or they feel they don't need it because they don't get sick or hurt or don't go to the doctor
Conversion disorder- Involves a patient who has a neurological issue of some sort after a stressful event (divorce, loss) while lab tests don't show a neurological explanation for the issue.
Somatoform disorder- Patient consistently complains of physical symptoms without a physiological explanation.