Alzheimer's disease is a degenerative medical condition marked by protein buildup in the brain, which leads to diminished neurological function. It is the most common form of dementia, a clinical term used to describe a set of related medical conditions characterized by sharp declines in memory, language skills, mental focus and attention, problem-solving, situational perception, and self-care capabilities. Alzheimer's disease is differentiated from other forms of dementia by the presence of atypical protein deposits known as plaques and tangles, which form in the brain's nerve cells and disrupt normal intracellular connections. While plaques and tangles certainly contribute to Alzheimer's symptoms, researchers note that the disease's exact developmental mechanisms are unknown and may include genetic and environmental factors and lifestyle. (Opposing Viewpoints)