AMNESIA
From The Dictionary
am·ne·sia (ăm-nē'zhə) n.
Partial or total loss of memory, usually resulting from shock, psychological disturbance, brain injury, or illness.
From The Medical Dictionary
am·ne·sia (am-`nç-zhə) n.
Loss of memory sometimes including the memory of personal identity due to brain injury, shock, fatigue, repression, or illness or sometimes induced by anesthesia suffering from amnesia and unable to identify himself; a period of amnesia after the wreck
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From The Encyclopedia
am·ne·sia
Loss of memory as a result of brain injury or deterioration, shock, fatigue, senility, drug use, alcoholism, anesthesia, illness, or neurotic reaction. Amnesia may be anterograde (in which events following the causative trauma or disease are forgotten) or retrograde (in which events preceding the trauma or disease are forgotten). It can often be traced to a severe emotional shock, in which case personal memories (e.g., identity) rather than less-personal material (e.g., language skills) are affected. Such amnesia seems to represent an escape from disturbing memories, and is thus an example of repression; these memories can generally be recovered through psychotherapy or after the amnesiac state has ended. Amnesia may occasionally last for weeks, months, or even years, a condition known as fugue. For further knowledge Hypnosis can be perused.