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Topic: Retrograde amnesia


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  Psychological Bulletin   (Site not responding. Last check: 2007-10-21)
Wasterlain (1971) noted that shrinkage of retrograde amnesia is seldom seen in patients with a short period of pretraumatic amnesia and pointed to this feature as one of a set of markers that distinguished those head injury patients with a short preictal amnesia from those with a more prolonged retrograde amnesia.
Retrograde amnesia may be temporally limited, such that it affects a specific period of time prior to the brain insult, or it may be temporally unlimited, in which it stretches back (in human cases) to childhood.
Zola-Morgan and Squire, 1990), one of the earlier controversies in retrograde amnesia research was regarding the presence or absence of a temporal gradient in the semantic retrograde memory functioning of amnesic patients.
htfdwww.htfd.uconn.edu /lboudreau/retamsyn.htm   (15256 words)

  
 Retrograde amnesia - Wikipedia, the free encyclopedia
Retrograde amnesia is a form of amnesia where someone will be unable to recall events that occurred before the onset of amnesia.
Retrograde amnesia is caused by trauma that results in brain injury.
Retrograde amnesia is often temporally graded, meaning that remote memories are more easily accessible than events occurring just prior to the trauma (Ribot's Law).
en.wikipedia.org /wiki/Retrograde_amnesia   (588 words)

  
 [No title]
Retrograde amnesia is seldom inclusive for public facts or the entirety of an individuals life, for the remote past appears to be better preserved than the more recent past in these cases (Squire, 1992).
Moreover, rather than a shrinking retrograde amnesia, in some cases (such as in fugue states) the forgotten memories (which may include almost all of the individuals prior life and childhood) may be quite suddenly recovered almost in total (Janet, 1927; Myers, 1903; Nemiah, 1979; Prince, 1939; see also chapters 29, 30).
Indeed, regardless of the etiology of the amnesia, although it is often presumed that the memory (such as memories at the moment of impact) was not formed, and that other memories were erased, this is not always the case.
brainmind.com /Amnesia.html   (3464 words)

  
 Retrograde Amnesia
The first is retrograde amnesia or the partial or total loss of the ability to recall events that cerebral have occurred during the period immediately preceding brain injury.
Retrograde amnesia is neurology a form of amnesia resulting from brain injury in which the individual loses memories for the time period just prior to the injury.
Retrograde Amnesia : Retrograde amnesia is a form of amnesia resulting from brain injury in which the individual loses memories for the time period neuroscience just Online Medical Dictionary and glossary with medical definitions Definition of Retrograde amnesia.
www.onewaylinks9.com   (417 words)

  
 Amnesia:Organic and Psychogenic
In these studies, amnesia was found rarely or not at all in non-violent crime: this may have reflected the locations of the studies, but there is evidence that in violent crime recall by victims and eyewitnesses is also impaired.
In this connection, the recent observations in organic amnesia of memory without awareness, and especially of preserved affective reactions in the presence of profound amnesia, are particularly intriguing.
Retrograde amnesia may result from a number of factors, including a failure to make use of contextual cues (with regard to time, order, place, and source) in 'reconstructing' past experience.
sabryabdelfattah.tripod.com /docs/AMNESIA.htm   (8378 words)

  
 Memory Loss & the Brain
Amnesia is a severe disruption of memory without deficits in intelligence, attention, perception or judgment.
There are three major classes of amnesia: anterograde amnesia, which is an impairment in storing new memories, retrograde amnesia, which is a loss of old memories, and psychogenic amnesia (or fugue state), which involves temporary loss of identity.
Anterograde and retrograde amnesia usually result from brain injury or disease, while psychogenic amnesia is a psychological condition that occurs in the absence of brain injury.
www.memorylossonline.com /glossary/amnesia.html   (251 words)

  
 Functional Amnesia 1989
Amnesia may be produced by severe emotional trauma, psychological illness, hypnotic suggestion, or naturally occurring changes in state or arousal.
The amnesia is usually precipitated by a severe emotional or psychological trauma (Abeles and Schilder, 1935; Thom and Fenton, 1920), and consists of several stages.
The problem posed by studies of interference in posthypnotic amnesia is that the interfering memory is episodic in nature, reflecting the residual trace of the subject's particular encounter with the interfering wordlist.
socrates.berkeley.edu /~kihlstrm/FunctAmn89.htm   (12823 words)

  
 MedFriendly.com: Amnesia
Anterograde amnesia is a loss or disturbance of memory for events that occur after a trauma, disease, or traumatic emotional event that caused the memory disturbance.
Retrograde amnesia is a loss or disturbance of memory for events that occurred before a trauma, disease, or a traumatic emotional event that caused the memory disturbance.
Posttraumatic amnesia is an inability to form consistent day-to-day memories due to several possible causes: (1) a trauma to the brain that is related to a head injury, (2) excessive alcohol use, or (3) stopping the use of alcohol or other drugs that affect mood, behavior, or thinking processes.
www.medfriendly.com /amnesia.html   (236 words)

  
 Amnesia: Health Topics: University of Iowa Health Care
Amnesia refers to loss of memory and is often the result of a traumatic event.
Retrograde amnesia is a loss of memory that occurs before the time of the event.
This is amnesia caused by a psychological trauma.
www.uihealthcare.com /topics/mentalemotionalhealth/ment3141.html   (381 words)

  
 Howstuffworks "What exactly is amnesia?"
Retrograde amnesia - Inability to remember events that occurred before the incidence of trauma or the onset of the disease that caused the amnesia
In most cases, amnesia is a temporary condition and is very brief, lasting from a few seconds to a few hours.
If someone is suffering from retrograde amnesia, he or she cannot recall memories that occurred before the onset of amnesia.
health.howstuffworks.com /question672.htm   (702 words)

  
 Howstuffworks "Amnesia: A Profile of Memory Loss"
Amnesia is the loss of memory and the inability to form new memories.
In most cases, this type of amnesia is not significant because no other memory is affected and no treatment is needed.
Amnesia of psychological origin is less common than other forms of amnesia.
health.howstuffworks.com /define-amnesia.htm   (551 words)

  
 Amnesiac Can’t Recall an Alibi
The court agreed with “jurisdictions across the country” that amnesia is not per se incompetence, but held that when, as here, the evidence is largely circumstantial, the trial court must consider the case's specific facts to determine whether the defendant is “able to perform functions essential to the fairness and accuracy” of the proceedings.
Retrograde amnesia can be further divided into episodic retrograde amnesia, which refers to loss of knowledge for personally experienced events, and semantic retrograde amnesia, referring to loss of memory for factual knowledge.
Palmer was apparently claiming episodic retrograde amnesia, such that he was unable to remember circumstances surrounding the alleged crime.
echo.forensicpanel.com /2001/6/1/amnesiaccant.html   (1292 words)

  
 The Straight Dope: Can you get amnesia from a blow to the head?
Retrograde amnesia is thought to be a failure of the brain's playback mechanism--the memories are still in there, you just can't get at them.
In the first case, an artist had a stroke and suffered severe retrograde and anterograde amnesia, forgetting his family, his friends, his work--everything but (brain damage can be so cruel) the faces of famous politicians.
One form of psychogenic amnesia is called dissociative fugue--the patient forgets his current identity and wanders off, yet remains mentally together enough to start a new life, sometimes remembering his old self only years later.
www.straightdope.com /columns/040416.html   (912 words)

  
 Amnesia Encyclopedia of Psychology - Find Articles
Contrary to the popular notion of amnesia-in which a person suffers a severe blow to the head, for example, and cannot recall his or her past life and experiences-the principal symptom of amnesia is the inability to retain new information, beginning at the point at which the amnesia began.
Retrograde amnesia refers to the loss of memory of one's past, and can vary from person to person.
Childhood amnesia, a term coined by Anna Freud in the late 1940s, refers to the fact that most people cannot recall childhood experiences during the first three to five years of life.
www.findarticles.com /p/articles/mi_g2699/is_0000/ai_2699000016   (444 words)

  
 Amnesia - Wikipedia, the free encyclopedia
Dissociative amnesia is used to refer to inability to recall information, usually about stressful or traumatic events in persons' lives, such as a violent attack or rape.
Global Amnesia is a common motif in fiction despite being extraordinarily rare in reality.
Author Gene Wolf addresses amnesia in the series "Soldier of the Mist", where the main character Latro is injured during battle, causing relatively long term (24 hour) anterograde amnesia.
en.wikipedia.org /wiki/Amnesia   (928 words)

  
 SpeechPathology.com: causes of retrograde amnesia
Retrograde amnesia in its pure form is very rare, and would involve an injury or disease that affected either the hippocampus, which is an area of the brain responsible for long term memory, or the inferior aspects of the temporal lobe, which plays a role in the memory for both visual and auditory events.
Retrograde amnesia is usually accompanied by anterograde amnesia, which is amnesia for events that follow the traumatic episode.
Another cause of retrograde amnesia would include anoxia, which is a deprivation of oxygen to the brain.
www.speechpathology.com /askexpert/display_question.asp?question_id=117   (476 words)

  
 Glossary: Retrograde Amnesia
Retrograde amnesia is a form of amnesia resulting from brain injury in which the individual loses memories for the time period just prior to the injury.
Very rarely, there have been reported cases in which an individual sustains pure retrograde amnesia as a result of a physical brain injury.
More often, retrograde amnesia occurs in an individual who also has anterograde amnesia.
www.memorylossonline.com /summer2003/glossary/retrogradeamnesia.html   (117 words)

  
 Episodic memory in transient global amnesia: encoding, storage, or retrieval deficit? -- Eustache et al. 66 (2): 148 -- ...
Contrary to retrograde amnesia, however, the mechanisms responsible for the anterograde amnesia have not been elucidated.
Transient global amnesia: implicit/explicit memory dissociation, and PET assessment of brain perfusion and oxygen metabolism in the acute stage.
The dissociation of retrograde and anterograde amnesia in a patient with herpes encephalitis.
jnnp.bmj.com /cgi/content/full/66/2/148   (4177 words)

  
 The neurology of memory: quantitative assessment of retrograde amnesia in two groups of amnesic patients -- Squire et ...
The neurology of memory: quantitative assessment of retrograde amnesia in two groups of amnesic patients -- Squire et al.
The neurology of memory: quantitative assessment of retrograde amnesia in two groups of amnesic patients
extent of retrograde amnesia was similar for the 2 groups.
www.jneurosci.org /cgi/content/abstract/9/3/828   (519 words)

  
 Components of amnesia
Retrograde amnesia:  disruption of memories that were previously encoded normally.
Amnesia during tasks that require memory for specific episode
extent of retrograde amnesia related to duration of current
core.ecu.edu /psyc/everhartd/courses/chap91013.htm   (627 words)

  
 Transient epileptic amnesia: a description of the clinical and neuropsychological features in 10 cases and a review of ...
Transient epileptic amnesia: a description of the clinical and neuropsychological features in 10 cases and a review of the literature -- Zeman et al.
Transient epileptic amnesia: a description of the clinical and neuropsychological features in 10 cases and a review of the literature
In conclusion, a persistent impairment of retrograde memory is a common accompaniment of TEA.
jnnp.bmjjournals.com /cgi/content/full/64/4/435   (5958 words)

  
 Arch Gen Psychiatry -- Retrograde Amnesia With Electroconvulsive Therapy: Characteristics and Implications, June 2000, ...
Arch Gen Psychiatry -- Retrograde Amnesia With Electroconvulsive Therapy: Characteristics and Implications, June 2000, Weiner 57 (6): 591
purposes) is often associated with amnesia; this amnesia represents
amnesia are reminiscent of many other types of organic amnesia,
archpsyc.ama-assn.org /cgi/content/extract/57/6/591   (212 words)

  
 Mental & Emotional Health: Amnesia   (Site not responding. Last check: 2007-10-21)
Anterograde amnesia is a loss of memory that occurs after the time of the event.
For example, many people involved in a severe car wreck may experience both types of amnesia.
TGA is caused by a problem related to blood flow in the brain.
www.baptistonline.org /health/library/ment3141.asp   (385 words)

  
 Anterograde Amnesia and Temporally Graded Retrograde Amnesia for a Nonspatial Memory Task after Lesions of Hippocampus ...
Anterograde Amnesia and Temporally Graded Retrograde Amnesia for a Nonspatial Memory Task after Lesions of Hippocampus and Subiculum -- Clark et al.
Anterograde Amnesia and Temporally Graded Retrograde Amnesia for a Nonspatial Memory Task after Lesions of Hippocampus and Subiculum
We studied the importance of the hippocampus and subiculum for anterograde and retrograde memory in the rat using social transmission
www.jneurosci.org /cgi/content/abstract/22/11/4663   (467 words)

  
 Retrograde amnesia definition - Medical Dictionary definitions of popular medical terms
Retrograde amnesia definition - Medical Dictionary definitions of popular medical terms
Retrograde amnesia: Amnesia in which the lack of memory relates to events that occurred before a traumatic event.
Retrograde amnesia is in contrast to antegrade amnesia in which the lack of memory relates to events that occurred after a traumatic event.
www.medterms.com /script/main/art.asp?articlekey=11959   (91 words)

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