Amnesia overview: Difference between revisions
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[[Amnesia]] | |||
{{CMG}} ; {{ADI}} | |||
==Overview== | ==Overview== | ||
'''Amnesia''' (from [[Greek language|Greek]] ''{{polytonic|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]]. Hysterical post-traumatic amnesia is an example of this. Amnesia may also be spontaneous, in the case of [[transient global amnesia]]<ref>[http://www.emedicine.com/neuro/topic380.htm eMedicine - Transient Global Amnesia : Article by Roy Sucholeiki<!-- Bot generated title -->]</ref>. This global type of amnesia is more common in middle-aged to elderly people, particularly males, and usually lasts less than 24 hours. Memory loss can be partial or total, and it is normal when it comes with [[Ageing|aging]]. | '''Amnesia''' (from [[Greek language|Greek]] ''{{polytonic|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]]. Hysterical post-traumatic amnesia is an example of this. Amnesia may also be spontaneous, in the case of [[transient global amnesia]]<ref>[http://www.emedicine.com/neuro/topic380.htm eMedicine - Transient Global Amnesia : Article by Roy Sucholeiki<!-- Bot generated title -->]</ref>. This global type of amnesia is more common in middle-aged to elderly people, particularly males, and usually lasts less than 24 hours. Memory loss can be partial or total, and it is normal when it comes with [[Ageing|aging]]. | ||
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|hippocampus]] cannot imagine the future[http://www.pnas.org/cgi/content/abstract/0610561104v1]. 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. | 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|hippocampus]] cannot imagine the future[http://www.pnas.org/cgi/content/abstract/0610561104v1]. 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. | ||
==References== | |||
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[[Category:Grammar]] | |||
Revision as of 00:43, 15 July 2012
Amnesia Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] ; Aditya Govindavarjhulla, M.B.B.S. [2]
Overview
Amnesia (from Greek Template:Polytonic) 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. Hysterical post-traumatic amnesia is an example of this. Amnesia may also be spontaneous, in the case of transient global amnesia[1]. This global type of amnesia is more common in middle-aged to elderly people, particularly males, and usually lasts less than 24 hours. Memory loss can be partial or total, and it is normal when it comes with aging.
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.