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11 Cards in this Set
- Front
- Back
Case Studies of Prosopagnosia |
Busigny (2010) - PS, 50 year old woman damaged occipital and temporal lobes in both hemispheres following bus accident. She was unable to recognise familiar faces, even her own, in photos BUT she could recognise people from peripheral details like voice. She had no problems recognising objects. |
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Case Studies of Prosopagnosia |
+Case studies have been very useful is helping our understanding of how FR works and has contributed greatly to the development of theories such as B&Y's theory. |
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Case Studies of Prosopagnosia |
- Tend to be those with ACQUIRED Proso. Each individual may have different areas/amounts of brain damage which makes it difficult to generalise about which parts of the brain link to which FR. |
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Case Studies of Prosopagnosia |
+ Although by studying Prosopag. many individuals have received reassurance that this is a serious issue and that 'they are not alone' there are significant ethical considerations. |
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Explanations of Prosopagnosia |
Most knowledge about Proso. is derived from those who have suffered from brain damage and hence have ACQUIRED Proso. Some individuals may inherit a gene which causes DEVELOPMENTAL Proso. Duchaine (2006) estimates 2% of the gen.pop. have DEVELOPMENTAL Proso. Two explanations have been proposed to explain Proso. 1) that it is a specialised function (FFA) 2) that it is no different to other object recognition. |
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Explanations of Prosopagnosia |
Since the use of brain scans, comparison of individuals with acquired Proso. suggests there is a specific part of the brain that is responsible for FR. The case of PS had specific damage to the FFA and occipital lobes in the right hemi. and was unable to recognise faces, even her own. |
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Explanations of Prosopagnosia |
+ Garrido (2009) found weaker activation in the FFA of 17 individuals with DEVELOPMENTAL Proso. |
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Explanations of Prosopagnosia |
Farah (1991) proposes that there is a continuum of agnosias such as object recognition, alexia and proso. At one end of the continuum lies problems decoding structure, at the other end lies problems assessing the relationships between components (holistic processing). Proso is an example of holistic processing failure. |
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Explanations of Prosopagnosia |
+ Busigny (2010) reported many cases of Proso. were not susceptible to the inversion effect. |
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Case Studies and Explanations of Prosopagnosia |
Many cases of Proso. have been helpful in supporting B&Y's theory of FR, such as CB who could say if a face was familiar or not but was unable to name them or give any personal information. |
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Case Studies and Explanations of Prosopagnosia |
Studying Developmental Proso. could be especially beneficial in assessing the degree to which perception is an innate ability or one which we develop. if we are able to identify a gene which determines deficits in FR, we might then be able to investigate if other features of perception are affected by genes. |