Alzheimerâ€™s disease is a type of irreversible, progressive brain disease that attacks and destroys the brainâ€™s cells, which results in a loss of memory and other essential cognitive functions. The neurodegenerative disease is responsible for causing up to sixty percent of dementia cases. Contrary to popular belief, Alzheimerâ€™s disease should not be considered a normal part of aging as approximately two hundred thousand people under the age of sixty-five have been diagnosed in the United States alone. Symptoms of the disease worsen over the years and are eventually terminal. Here are the seven stages.
Stage One: No Impaired Behavior
A patient usually does not exhibit symptoms of memory loss or other cognitive impairments during stage one of Alzheimerâ€™s disease. The only way the disease can be detected during this stage is by a positron emission tomography (PET) scan, which is an imaging test that studies how well the brain is working. As the disease progresses into other stages, a patient will experience more changes in their reasoning or thinking.