Loss of memory of events prior to onset of anmesia. A component of Korsakoff's "psychosis" but also seen after transient disturbances of brain function with little or no permanent damage. Compare to anterograde amnesia.
The condition in which people lose past memories, such as memories for events, facts, people, or even personal information. go to glossary index
The period of amnesia for events before the injury. This is almost always much less than the period of POST TRAUMATIC AMNESIA (qv) and is not as good a predictor of outcome as PTA. However, given that there is a period of RA and PTA where significant head injury occurs, it means that the patient will not remember the moment of impact nor, usually, the events leading up to it. Due to RA (and also PTA), it is rare to find POST TRAUMATIC STRESS DISORDER (qv) after brain injury.
(ret´ ro¯-gra¯d) A memory disorder characterized by an inability to retrieve old long-term memories, generally for a specific period of time extending back from the beginning of the disorder.
loss of memory for events immediately preceding a trauma
inability to remember events immediately preceding the head injury or event.
A loss or impairment of memory of events preceding injury. In a traffic accident, a person who has been unconscious for a considerable time or who has lost much blood at the scene or the person may have no recollection of events immediately preceding the crash.
Inability to recall events prior to the accident. May be a specific span of time or type of information.
a memory impairment affecting the recall of events or experiences that occurred prior to the traumatic injury
A memory deficit, often suffered after a head injury, in which the patient loses memory of some period prior to the injury. See also anterograde amnesia.
Inability to remember events that happened for a period before a blow to the head.
Retrograde amnesia is a form of amnesia where someone will be unable to recall events that occurred before the onset of amnesia. The term is used to categorise patterns of symptoms, rather than to indicate a particular cause or etiology.