People with Alzheimer's disease typically show signs of memory loss, confusion, and impaired judgment. Other symptoms include restlessness, a deterioration of language skills, and mood swings. In most cases, the brain tissue of someone with Alzheimer's disease contains abnormal protein clumps and tangled bundles of fibers. However, the exact reasons why these abnormalities occur are still unknown. Although the condition is not a normal part of aging, a person becomes more likely to develop it as he or she gets older. Medications exist to help treat symptoms, but there is currently no cure.