Retrograde amnesia
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Retrograde amnesia (Latin retro 'backwards'; English retrograde amnesia) is a specific form of amnesia in which individuals are no longer able to remember events prior to a specific, usually traumatic, event.
Memory loss refers to a (usually short) period of time prior to the specific event; for example, a patient can no longer remember the course of an accident. When these memory lapses are severe, the resulting uncertainty can be distressing for those affected.
Retrograde amnesia may also occur in conjunction with foreground anterograde amnesia in Korsakow syndrome.
A particularly severe known case of retrograde amnesia is the case of Benjaman Kyle, who was found beaten up near a fast food outlet in 2004 and tried to regain his memory with the help of the media. You see, there was no one who knew him or could help him remember. Bits and pieces of memories of his past come back as he is reminded of past experiences by objects and places. It was not until 11 years later that his identity could be clarified through DNA tests.
