problems with abstract thinking; frequently misplacing things; changes in mood or behavior; changes in personality; and loss of initiative (Diagnosing Alzheimer's, 2004). As one might imagine, people who are diagnosed with Alzheimer's often are treated for psychological conditions, such as depression, and people with Alzheimer's often exhibit physical characteristics such as low blood pressure, constipation and even a decreased sense of smell (Diagnosing Alzheimer's, 2004). In fact, researchers now believe that low blood pressure and a decreased sense of smell may be early predictors for the onset of Alzheimer's (Diagnosing Alzheimer's, 2004).
             In genetically transferred cases of Alzheimer's disease, the genes that can cause the disease are located on chromosomes 21, 14 and 1, although links to more genes are currently being studied (Alzheimer's disease, No date). Historically, the link between a gene mutation on chromosome 21 and Alzheimer's was discovered first, with scientists subsequently discovering links between Alzheimer's and mutations on chromosomes 14 and 1, respectively (Mullan, et.al., 1995). All of the gene mutations seem to result in the over-production of B amyloid, which is a protein commonly found in neuritic plaques (Alzheimer's disease, No date).
             Recent studies have shown that environment can play a strong role in encouraging or discouraging the onset of Alzheimer's symptoms. The disease may be transmitted genetically, but it seems a person's level of activity or intellectual stimulation influence how soon the onset of symptoms occurs. A research group from the University of Chicago reported in 2005 that a study of mice genetically predisposed to contract Alzheimer's disease found that mice who were raised in more stimulating environments, with more opportunity to exercise and learn, produced higher levels of an enzyme that breaks down amy...