Alzheimers disease :
Alzheimer's disease is commonly seen in people over 60 years of age. In this disease, parts of the brain that control thought, language, and memory get affected. As a result, the person forgets how to hold onto a conversation and may experience memory loss. In the initial stages, this memory loss may be mild but as the disease progresses further, it can lead to complete dementia. Apart from advanced age, having a family history of Alzheimer's disease is a great risk factor as it makes you prone to suffer from it too.