Amnesia is a disease of the brain which affects the remembering area of the memory. It is affected by any severe head injury and or thru the intake of some toxic matter affecting the brain. This disease could impact all those suffering from heart stroke or paralysis.
People suffering from Amnesia have tough time recollecting the previously known and learnt information like their language or name.
Amnesia victims never know their past or things associated with the same like people, place etc.