Alzheimer's disease is most likely formed by other symptoms called dementia. Dementia is not a disease per se, but it has a wide range of warning symptoms of many types of illness. When dementia is detected in an individual, their memory tends to decline and it becomes difficult to perform daily tasks. When diagnosing individuals, a series of steps are taken to see if the individual has progressed to dementia and also what illness caused these symptoms to appear. These stages are preclinical, mild cognitive impairment (MCI), and dementia. In the preclinical stage, there are three substages that deal with the buildup of proteins and plaques in the brain called beta-amyloid. The symptoms of this stage are undetectable. The second stage is the MCI phase, which contains more visible symptoms such as deterioration in thinking skills. The third stage is dementia. The symptoms in this stage are more severe and researchers use biomarkers (biochemical trackers) to detect the disease. Questions have been asked about whether people diagnosed with MCI are more likely to progress to dementia or progress to Alzheimer's disease. There have been some experiments on this issue, but people diagnosed with mild cognitive impairment (MCI) tend to progress past the third stage, which is dementia and progression to Alzheimer's disease. When a person is diagnosed with a certain health problem, it doesn't happen in seconds, it happens as a regular process. First there are symptoms that most people ignore until diagnosed, then after a few years of ignoring the symptoms the person is diagnosed. Minor symptoms may begin with mild memory loss which could result in, for example, misplacing car keys and forgetting... middle of paper ... the individual's mental abilities begin to deteriorate to slow down. Finally, the third stage concerned dementia. It is at this stage that cognitive functions begin to shut down. Researchers diagnose individuals at this stage and check whether they have progressed to Alzheimer's disease. Detecting Alzheimer's disease is easier for researchers to detect because the symptoms are noticeable and their cognitive and behavioral deterioration. These people begin to have mood swings, obsessive-compulsive disorder, and unacceptable social behavior. Referring to the BMC Neurology research experiment, it showed that 54 people were diagnosed with dementia and 50 people progressed to Alzheimer's disease. This concludes that people diagnosed with mild cognitive impairment (MCI) tend to pass the third stage, which is dementia and progression to Alzheimer's disease...