Amnesia natural history
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Amnesia Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Amnesia natural history On the Web |
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American Roentgen Ray Society Images of Amnesia natural history |
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Risk calculators and risk factors for Amnesia natural history |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Aditya Govindavarjhulla, M.B.B.S. [2]
Overview
Amnesia (from Greek Ἀμνησία) is a condition in which memory is disturbed. The causes of amnesia are organic or functional. In simple terms it is the loss of memory. Organic causes include damage to the brain, through trauma or disease, or use of certain (generally sedative) drugs. Functional causes are psychological factors, such as defense mechanisms.
Natural History, Complications, Prognosis
The cause determines whether amnesia comes on slowly or suddenly, and whether it is temporary or permanent.
Another effect of amnesia is the inability to imagine the future. A recent study published online in the Proceedings of the National Academy of Sciences shows that amnesiacs with damaged hippocampus cannot imagine the future[3]. This is because when a normal human being imagines the future, they use their past experiences to construct a possible scenario. For example, a person who would try to imagine what would happen at a party that would occur in the near future would use their past experience at parties to help construct the event in the future.