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Topic: Prosopagnosia


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In the News (Tue 19 Feb 19)

  
  Prosopagnosia - Wikipedia, the free encyclopedia
Prosopagnosia (sometimes known as face blindness) is a rare disorder of face perception where the ability to recognize faces is impaired, although the ability to recognize objects may be relatively intact.
It has also been argued that prosopagnosia may be a general impairment in understanding how individual perceptual components make up the structure or gestalt of an object.
Prosopagnosia was originally thought only to be solely associated with brain injury, acquired during adulthood, or more rarely during childhood development.
en.wikipedia.org /wiki/Prosopagnosia   (1078 words)

  
 Prosopagnosia: Seeing the World through Fog-Colored Glasses
Specifically, the locus of damage that results in prosopagnosia appears to be the medial occipitotemporal cortex (4), though the disorder may be congenital or acquired (2).
This is a compelling possibility, despite the resounding inefficiency of the grandmother cell hypothesis as a whole, given that prosopagnosia and the corresponding facial agnosia seem to represent different strains of one breed of problem (6).
And while prosopagnosia is not thought to be entirely a function of impaired memory, it does equate to a sort of perceptual amnesia, of both the retrograde and anterograde varieties.
serendip.brynmawr.edu /bb/neuro/neuro01/web2/Ridgway.html   (1253 words)

  
 Prosopagnosia - UPCMedicalDirectory
Prosopagnosia, or face-blindness, is when you are unable to recognize other humans by their faces in spite of having good eye sight.
Prosopagnosia (face blindness): a description of an abnormal condition in which face recognition is impaired, with particular emphasis on congenital...
Prosopagnosia (face blindness): a description of an abnormal condition in which face recognition is impaired, with particular emphasis on congenital or...
www.upcmd.com /?First=Prosopagnosia   (601 words)

  
 Prosopagnosia Research Centers at Harvard University and University College London - Research
Reports of prosopagnosia date back to antiquity, but Bodamer's report (1947) of two individuals was a landmark paper in that he extensively described the symptoms and declared it to be distinct from agnosia.
In contrast, in cases of developmental prosopagnosia, the onset of prosopagnosia occurred prior to developing normal face recognition abilities (adult levels of face recognition are reached during teenage years).
Developmental prosopagnosia has been used to refer to individuals whose prosopagnosia is genetic in nature, individuals who experienced brain damage prior to experience with faces (prenatal brain damage or immediate brain damage), and individuals who experienced brain damage or severe visual problems during childhood.
www.faceblind.org /research   (1023 words)

  
 Asperger/Autism: On The Same Page: Prosopagnosia Page
Prosopagnosia was first observed and documented several hundred years before Christ, but it was not named until 1947 by someone named Bodamer.
Covert recognition of faces in prosopagnosia, in which patients cannot overtly recognize faces but nevertheless manifest recognition when tested in certain indirect ways, has been interpreted as the functioning of an intact visual face recognition system deprived of access to other brain systems necessary for consciousness.
Implications for the nature of prosopagnosia, and for other types of dissociations between conscious and unconscious perception, are discussed.
www.spidernet.nl /~martijn_dekker/otsp/prosopagnosia.html   (869 words)

  
 Prosopagnosia at opensource encyclopedia   (Site not responding. Last check: 2007-09-17)
Prosopagnosia is a disorder of face perception where the ability to perceive and understand faces is impaired, although other basic perceptual skills (such as recognising and discrimating objects) may be relatively intact.
There is some debate about the specificity of both face perception and prosopagnosia and some people have argued that it is just a sub-form of visual agnosia.
Developmental or congenital prosopagnosia is a condition that has only been recently reported and suggests that some people are born with a selective impairment in recognising and perceiving faces.
www.wiki.tatet.com /Prosopagnosia.html   (933 words)

  
 Sparrow's Nest   (Site not responding. Last check: 2007-09-17)
Prosopagnosia, also called face-blindness, is an acquired or inborn neurological condition that impairs an individual's ability to properly recognize the human face, leading a person to create new ways of identifying others.
Prosopagnosia may be caused by poor vision during the crucial years when a child's brain is developing.
Prosopagnosia caused by poor vision in childhood appears to be permanent, similar to congenital prosopagnosia.
www.realm-of-shade.com /sparrow/homework/proso01.html   (1899 words)

  
 Journal of Vision - What types of configural face processing are impaired in prosopagnosia?, by Grand, Maurer, ...
Prosopagnosia is a severe impairment in identifying faces that has been associated with deficits in configural face processing--perceiving relations among facial features.
Prosopagnosia can result from post-natal occipito-temporal damage (AP--acquired prosopagnosia), or occur with no apparent brain damage and be present from early in life (DP--developmental prosopagnosia).
Although other tests with this cohort indicate that prosopagnosia is not restricted to configural processing deficits, the present results show that AP can be associated with impairment in all three types of configural processing, whereas DP is associated mainly with deficits in one particular type--sensitivity to second-order relations.
journalofvision.org /3/9/827   (364 words)

  
 Mind Hacks: When faces fade
The main finding of the study was that prosopagnosia seemed to be inherited in an autosomal dominant fashion, meaning only a single gene from one parent is needed to cause the condition.
If we find the gene responsible for prosopagnosia, it may well be a regulator gene like the language gene, but of course, it may also be a gene influencing the connectivity of brain areas directly.
In May, 2005, we will open a prosopagnosia clinic at the Insitute of Human Genetics in M√ľnster, where hereditary prosopagnosia can be diagnosed and we can advise parents about the probability of their children being affected.
www.mindhacks.com /blog/2005/03/when_faces_fade.html   (1117 words)

  
 OrionRobots : Prosopagnosia
Life can be quite different for someone with Prosopagnosia, and sometimes they may not be able to identify someone until they actually speak.
Prosopagnosia is very hard to explain to others, and can often be met with derision and disbeleif.
Wearing an enhancement unit would make the severity clear and alert others to the fact that this person may not recognise you, and not to be offended if they seem not to recognise you, or look at you a little too hard (while they try to figure out who you actually are).
orionrobots.co.uk /tiki-index.php?page=Prosopagnosia   (594 words)

  
 New Scientist Breaking News - Face blindness runs in families
People with prosopagnosia, or face blindness, cannot easily tell faces apart, even if they belong to people they know well, and so often see their friends and family as strangers.
Using a questionnaire to identify prosopagnosia symptoms, the team found 38 prosopagnosics in seven families.
By plotting the condition on family trees, the team showed that the inheritance pattern is consistent with the trait being carried by a single gene: just one defective copy of the gene could make the carrier face-blind.
www.newscientist.com /article.ns?id=dn7174   (530 words)

  
 The Berkeley Science Review: Read: Articles   (Site not responding. Last check: 2007-09-17)
Prosopagnosia is a relatively rare condition and may occur after a stroke or other brain injury.
As prosopagnosia affects only a patient’s ability to recognize faces, its diagnosis has led to arguments that face recognition is achieved by dedicated mechanisms in the brain.
While only a small number of cases of congenital prosopagnosia have been reported in the medical and scientific literature, there are reasons to believe that it is more common than assumed.
socrates.berkeley.edu:7066 /articles.php?issue=1&article=briefs_3   (678 words)

  
 Prosopagnosia / Face Blindness   (Site not responding. Last check: 2007-09-17)
Prosopagnosia is a relatively rare condition and may result from stroke or brain injury.
Nevertheless, in some cases, prosopagnosia can occur with no apparent neural damage and be present from early childhood (just as in the case of dyslexia).
However, while only a small number of cases of developmental prosopagnosia have been reported in the medical and scientific literature, there are reasons to believe that the condition is more common than reflected in the literature.
www.ucl.ac.uk /~ucjtnsa/prosop.html   (494 words)

  
 Prosopagnosia.net - The International Prosopagnosia Association Online - Advice & Support on face-blindness; a ...   (Site not responding. Last check: 2007-09-17)
Prosopagnosia, also called face-blindness, is a difficulty in recognising faces.
The association was started in 2003 with the aim of promoting the understanding of the condition, which at this stage is relatively unknown about in the public domain and providing a support network to prosopagnosics who suffer varying degrees of the condition.
The advantage of doing this is a greater understanding of the condition as we learn more about it and the opportunity of increasing our cooperation with those in the fields of psychology and medicine who are exploring the area.
www.prosopagnosia.net   (210 words)

  
 Prosopagnosia ('Face Blindness') in Autism   (Site not responding. Last check: 2007-09-17)
Temple Grandin, a high-functioning woman with autism, often got into embarrassing situations because she did not remember faces unless she had seen the people many times or they had a very distinct facial feature, such as a big beard, thick glasses or a strange hairstyle.
Some researchers even suggest that prosopagnosia may be essential symptom in autistic spectrum disorder, perhaps a specific subgroup of Asperger syndrome.
For people who cannot 'read' faces because of face blindness or/and cannot 'hear' emotions in voices because of their auditory processing problems, it is extremely difficult not only to understand emotions in others but also to express emotions themselves otherwise than using words.
www.suite101.com /article.cfm/autism_world/96900   (552 words)

  
 Prosopagnosia: My Favorite Word   (Site not responding. Last check: 2007-09-17)
I have never heard of prosopagnosia before; are there many people like you?
Having read this far, you can probably imagine that there are certain specific situations that I find most vexing. I've written an essay on the topic of school uniforms, and I bet you'll find what I wrote on the topic to be most interesting. You can read that essay at this link.
Prosopagnosia has also attracted the attention of a syndicated advice columnist here in the United States. To see what Ann Landers had to say on the issue, follow this link.
home.earthlink.net /~blankface/prosopagnosia.shtml   (688 words)

  
 Face Blindness ( Prosopagnosia ) and stones
Prosopagnosia, or face-blindness, is when you are unable to recognize other humans by their faces.
Prosopagnosia, or face-blindness, is what you get when that centre is damaged or otherwise unable to perform its functions.
This page is devoted to trying to explain what it can be like to identify the people around you using another centre of the brain, the general pattern recognition centre that most people would use to recognize objects like stones or twigs.
www.prosopagnosia.com /main/stones/index.asp   (872 words)

  
 [No title]   (Site not responding. Last check: 2007-09-17)
Prosopagnosia is derived from Greek, with proso meaning face, and gnosia, meaning lack of knowledge.
A person with prosopagnosia is sometimes referred to as face blind.
The first is to be born with the disorder, and the second is to get it as a result of a stroke, coma, or other brain trauma.
www.umm.maine.edu /resources/beharchive/beh450/AmandaAdams/proso.html   (429 words)

  
 Davis Dyslexia Discussion Board
But I don't think that prosopagnosia is something developed so much as that it reflects undeveloped face-recognition ability.
Mom had prosopagnosia worse than me. From what I remember she even told me she could remember faces when she was young also.
Prosopagnosia officially happens as a result of an accident/brain trauma, similiar to how some who never had seizures could suddenly start having them after trauma to the brain.
www.dyslexiatalk.com /messages/56/3805.shtml   (3858 words)

  
 Visual Agnosia
Prosopagnosia is type of associative agnosia specific for face recognition that can be so severe patients cannot even recognize their own faces.
Occurs in the absence of any other disorder of visual processing, suggesting that there are areas of the brain that specifically process visual information pertaining to face recognition.
The complexity of face recognition strongly suggests that there are multiple regions of the brain involved in face processing, that if damaged lead to prosopagnosia, but the exact underlying cause has yet to be identified.
www.davidson.edu /academic/psychology/ramirezsite/neuroscience/psy324/lerossello/prosopagnosia.htm   (142 words)

  
 Carnegie Mellon Press Release: April 4, 2005
Psychology Professor Marlene Behrmann and postdoctoral associate Galia Avidan have found that people with congenital prosopagnosia—in which their ability to recognize faces is impaired from birth—are not just deficient at recognizing individuals they know, but they are also poor at simply discriminating between two faces when presented side by side.
Given that the impaired behavior in those individuals with prosopagnosia is a function of the brain, we need to identify the neural system that has given rise to this altered pattern of behavior," Behrmann said.
Congenital prosopagnosia seems to run in families, which suggests a genetic basis, although that is not true in every case and Behrmann cautioned against calling the condition a genetic disorder.
www.cmu.edu /PR/releases05/050404_faces.html   (480 words)

  
 Katie Greene
To people with prosopagnosia, the instant someone leaves their sight the memory of that person's face is blank--or, at best, a palette of muddled features.
The effects of prosopagnosia can be so bad that people with severe cases cannot recognise their own parents or children.
So, while science has yet to pin down what it is that people with prosopagnosia are missing when they recall a blur instead of a face--and therefore what allows everybody else to be so good at recognising one another--it is making good progress towards that goal.
homepage.mac.com /katiegreene/writingsamples/Aboutface.html   (922 words)

  
 BrainConnection.com - Research in Visual Perception: The Significance of Face Recognition - Part 5
Prosopagnosics can recognize a face as a face, however, they are not able to link the face with anything they once knew about the person such as their name, age, occupation or relationship.
Often, prosopagnosia is accompanied by impaired ability to recognize other objects such as animals and abstract signs.
This fact leads some scientists to argue that prosopagnosia is evidence against a unique brain mechanism for face recognition.
www.brainconnection.com /topics?main=fa/face-perception5   (631 words)

  
 Prosopagnosia as a Deficit in Encoding Curved Surface -- Laeng and Caviness 13 (5): 556 -- The Journal of Cognitive ...
Prosopagnosia as a Deficit in Encoding Curved Surface -- Laeng and Caviness 13 (5): 556 -- The Journal of Cognitive Neuroscience
Prosopagnosia as a Deficit in Encoding Curved Surface
prosopagnosia can be the result of a deficit in the representation
jocn.mitpress.org /cgi/content/abstract/13/5/556   (369 words)

  
 ACCESS: Nonverbal Learning Disabilities   (Site not responding. Last check: 2007-09-17)
Prosopagnosia: Also known as "face blindness", this condition impairs a person's ability to recognize human faces.
In autistic people, what appears to be prosopagnosia may actually be due to lack of eye contact or social interest.
Prosopagnosia: A look at the laterality and specificity issues using evidence from neuropsychology and neurophysiology (scroll down to second article on page)
www.autistics.org /access/information/motor/other.html   (307 words)

  
 A Mixture of Experts Model Exhibiting Prosopagnosia   (Site not responding. Last check: 2007-09-17)
A considerable body of evidence from prosopagnosia, a deficit in face recognition dissociable from nonface object recognition, indicates that the visual system devotes a specialized functional area to mechanisms appropriate for face processing.
We present a modular neural network composed of two ``expert'' networks and one mediating ``gate'' network with the task of learning to recognize the faces of 12 individuals and classifying 36 nonface objects as members of one of three classes.
The results roughly agree with data reported for prosopagnosic patients: as damage to the ``face'' expert increases, the network's face recognition performance decreases dramatically while its object classification performance drops slowly.
www-cse.ucsd.edu /users/mdailey/papers/cogsci97.html   (191 words)

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