Alzheimer's Disease
Alzheimer's Disease
Alzheimer's disease is a form of dementia, "a brain disorder that seriously affects a person's ability to carry out daily activities (Shenk 14)". Alzheimer's is a progressive and irreversible brain disorder that slowly destroys a person's memory and ability to learn, make judgments, communicate, and accomplish daily activities. As Alzheimer's progresses, individuals may also experience changes in personality and behavior, such as anxiety, suspiciousness or aggravation, as well as illusions or hallucinations.
Alzheimer's disease is named after a German doctor, Dr. Alois Alzheimer. In 1906, Dr. Alzheimer became aware of changes in the brain tissue of a woman who had died of an unusual mental illness. Dr. Alzheimer found irregular clusters and tangled bundles of fibers. Today, these plaques and tangles in the brain are considered signs of Alzheimer's (Shenk 12-14). Scientists have also found other brain changes in people with Alzheimer's. Nerve cells die in areas of the brain that are vital to memory and other mental abilities. There also are lower levels of some of the chemicals in the brain that carry messages back and forth between nerve cells. Although many things are known about Alzheimer's, there are still many things that remain a mystery, such as causes, and how to cure Alzheimer's.
Alzheimer's disease affects the brain cells which are called neurons. Neurons send messages from one to another, which allows us to think, remember and speak. In each of the neurons there is a branch like structure. Some carry impulses away from neurons (afferent), and some bring impulses to the neurons (efferent). The relaying of impulses from neuron to neuron in the brain makes it possible for one to carry out physical and mental tasks. When plaques and tangles form in the brain, they disrupt the flow of messages to the neurons. This happens when people age, but with an Alzheimer's patient there are many more that...
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