Memory is one of the most essential cognitive functions of the brain. Intellect, learning, communication, problem solving; all require an intact memory. For years together, our brain learns and retains new concepts and uses stored information to solve problems. And then one day, after many years, this ability declines and we begin to forget what we once knew. Dementia is a brain disorder in which one cannot remember what was learnt in the past and also, one is unable to retain new information. It is well understood as a deterioration of the memory, intellect, as well as personality; and manifests as a complete transformation of behavior, demeanor and thinking.
