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amnesia





A total loss of memory for events for a period of time or for events. In cases of concussion, retrograde amnesia is the permanent loss of memory for events just preceding a head injury while post-traumatic amnesia applies to a period after injury during which the patient may be conscious but incapable of recall, both at the time and later. Similar behavior to the latter, termed fugue, occurs as a psychiatric phenomenon. See also Korsakov's syndrome.


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   • HEALTH AND DISEASE