Lewy Bodies are abnormal protein deposits found in the brain, primarily associated with Parkinson's disease and Lewy Body dementia. These deposits disrupt normal brain function, leading to symptoms such as tremors, stiffness, and cognitive changes. They are named after the German neurologist Frederik Lewy, who first identified them in the early 20th century. The presence of Lewy Bodies can affect a person's mood, memory, and ability to think clearly. People with conditions related to Lewy Bodies may experience visual hallucinations and fluctuations in attention. Understanding these deposits helps researchers develop better treatments for related disorders.