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Prosopagnosia

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https://www.readbyqxmd.com/read/28513322/people-with-and-without-prosopagnosia-have-insight-into-their-face-recognition-ability
#1
Lucy Anne Livingston, Punit Shah
No abstract text is available yet for this article.
May 17, 2017: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/28490791/intact-word-processing-in-developmental-prosopagnosia
#2
Edwin J Burns, Rachel J Bennetts, Sarah Bate, Victoria C Wright, Christoph T Weidemann, Jeremy J Tree
A wealth of evidence from behavioural, neuropsychological and neuroimaging research supports the view that face recognition is reliant upon a domain-specific network that does not process words. In contrast, the recent many-to-many model of visual recognition posits that brain areas involved in word and face recognition are functionally integrated. Developmental prosopagnosia (DP) is characterised by severe deficits in the recognition of faces, which the many-to-many model predicts should negatively affect word recognition...
May 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28459990/mapping-the-impairment-in-decoding-static-facial-expressions-of-emotion-in-prosopagnosia
#3
Daniel Fiset, Caroline Blais, Jessica Royer, Anne-Raphaëlle Richoz, Gabrielle Dugas, Roberto Caldara
Acquired prosopagnosia is characterized by a deficit in identifying faces. The brain lesions leading to prosopagnosia are diverse. Interestingly, most prosopagnosic patients suffering from posterior lesions, use the mouth instead of the eyes for face identification. Whether this bias is present for facial expressions has not yet been addressed. We tested PS, a pure case of acquired prosopagnosia with bilateral occipitotemporal lesions anatomically sparing the regions dedicated for facial expression recognition...
April 28, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28405380/robust-associations-between-the-20-item-prosopagnosia-index-and-the-cambridge-face-memory-test-in-the-general-population
#4
Katie L H Gray, Geoffrey Bird, Richard Cook
Developmental prosopagnosia (DP) is a neurodevelopmental condition, characterized by lifelong face recognition deficits. Leading research groups diagnose the condition using complementary computer-based tasks and self-report measures. In an attempt to standardize the reporting of self-report evidence, we recently developed the 20-item prosopagnosia index (PI20), a short questionnaire measure of prosopagnosic traits suitable for screening adult samples for DP. Strong correlations between scores on the PI20 and performance on the Cambridge Face Memory Test (CFMT) appeared to confirm that individuals possess sufficient insight into their face recognition ability to complete a self-report measure of prosopagnosic traits...
March 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28400326/developmental-visual-perception-deficits-with-no-indications-of-prosopagnosia-in-a-child-with-abnormal-eye-movements
#5
Sharon Gilaie-Dotan, Ravid Doron
Visual categories are associated with eccentricity biases in high-order visual cortex: Faces and reading with foveally-biased regions, while common objects and space with mid- and peripherally-biased regions. As face perception and reading are among the most challenging human visual skills, and are often regarded as the peak achievements of a distributed neural network supporting common objects perception, it is unclear why objects, which also rely on foveal vision to be processed, are associated with mid-peripheral rather than with a foveal bias...
April 9, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28368140/what-do-eye-movements-tell-us-about-the-visual-perception-of-individuals-with-congenital-prosopagnosia
#6
Manuela Malaspina, Andrea Albonico, Carlo Toneatto, Roberta Daini
OBJECTIVE: The lack of inversion effect for face recognition in congenital prosopagnosia (CP) is consistent with the hypothesis of a failure in holistic processing. However, although CPs' abnormal gaze behavior for upright faces has already been demonstrated, neither their scanning strategy for inverted faces, nor the possibility that their abnormal gaze behavior with upright faces is because of reasons other than the holistic deficit have been investigated yet. METHOD: We recorded the eye movements of a congenital prosopagnosic and a control group during the encoding of unknown faces, objects, and flowers...
April 3, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28244174/damage-to-right-medial-temporal-structures-disrupts-the-capacity-for-scene-construction-a-case-study
#7
Muireann Irish, Annu Mothakunnel, Nadene Dermody, Nikki-Anne Wilson, John R Hodges, Olivier Piguet
The medial temporal lobes (MTLs) are widely held to support a range of constructive endeavors including remembering the past, envisaging the future, and imagining hypothetical scenarios. While right MTL structures have been ascribed a prominent role in the construction of spatial contexts, lesion evidence to directly test this hypothesis is lacking. To this end, we assessed scene construction performance in two cases, GC and DF, who presented with left- and right-lateralized presentations of semantic dementia, respectively...
February 28, 2017: Hippocampus
https://www.readbyqxmd.com/read/28229125/the-clinical-neuroanatomical-and-neuropathologic-phenotype-of-tbk1-associated-frontotemporal-dementia-a-longitudinal-case-report
#8
Carolin A M Koriath, Martina Bocchetta, Emilie Brotherhood, Ione O C Woollacott, Penny Norsworthy, Javier Simón-Sánchez, Cornelis Blauwendraat, Katrina M Dick, Elizabeth Gordon, Sophie R Harding, Nick C Fox, Sebastian Crutch, Jason D Warren, Tamas Revesz, Tammaryn Lashley, Simon Mead, Jonathan D Rohrer
INTRODUCTION: Mutations in the TANK-binding kinase 1 (TBK1) gene have recently been shown to cause frontotemporal dementia (FTD). However, the phenotype of TBK1-associated FTD is currently unclear. METHODS: We performed a single case longitudinal study of a patient who was subsequently found to have a novel A705fs mutation in the TBK1 gene. He was assessed annually over a 7-year period with a series of clinical, cognitive, and magnetic resonance imaging assessments...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28193545/gaze-cueing-requires-intact-face-processing-insights-from-acquired-prosopagnosia
#9
Nicolas Burra, Dirk Kerzel, Meike Ramon
Gaze-cueing is the automatic spatial orienting of attention in the direction of perceived gaze. Participants respond faster to targets located at positions congruent with the direction of gaze, compared to incongruent ones (gaze cueing effect, GCE). However, it still remains unclear whether its occurrence depends on intact integration of information from the entire eye region or face, rather than simply the presence of the eyes per se. To address this question, we investigated the GCE in PS, an extensively studied case of pure acquired prosopagnosia...
April 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28187081/tumoral-presentation-of-homonymous-hemianopia-and-prosopagnosia-in-cerebral-amyloid-angiopathy-related-inflammation
#10
Clotilde Hainline, Janet C Rucker, David Zagzag, John G Golfinos, Yvonne W Lui, Benjamin Liechty, Floyd A Warren, Laura J Balcer, Steven L Galetta
While cerebral amyloid angiopathy is a common cause of lobar hemorrhage, rarely it may be associated with an inflammatory response, thought to be incited by amyloid deposits. We report a 73-year-old woman with an extensive cancer history who presented with tumor-like lesions and symptoms of homonymous hemianopia and prosopagnosia. Found to have cerebral amyloid angiopathy-related inflammation proven by brain biopsy, she was treated successfully with immunosuppression.
March 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28167906/non-invasive-mapping-of-face-processing-by-navigated-transcranial-magnetic-stimulation
#11
Stefanie Maurer, Katrin Giglhuber, Nico Sollmann, Anna Kelm, Sebastian Ille, Theresa Hauck, Noriko Tanigawa, Florian Ringel, Tobias Boeckh-Behrens, Bernhard Meyer, Sandro M Krieg
Background: Besides motor and language function, tumor resections within the frontal and parietal lobe have also been reported to cause neuropsychological impairment like prosopagnosia. Objective: Since non-navigated transcranial magnetic stimulation (TMS) has previously been used to map neuropsychological cortical function, this study aims to evaluate the feasibility and spatial discrimination of repetitive navigated TMS (rTMS) mapping for detection of face processing impairment in healthy volunteers. The study was also designed to establish this examination for preoperative mapping in brain tumor patients...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28139958/perceptual-learning-of-faces-a-rehabilitative-study-of-acquired-prosopagnosia
#12
Jodie Davies-Thompson, Kimberley Fletcher, Charlotte Hills, Raika Pancaroglu, Sherryse L Corrow, Jason J S Barton
Despite many studies of acquired prosopagnosia, there have been only a few attempts at its rehabilitation, all in single cases, with a variety of mnemonic or perceptual approaches, and of variable efficacy. In a cohort with acquired prosopagnosia, we evaluated a perceptual learning program that incorporated variations in view and expression, which was aimed at training perceptual stages of face processing with an emphasis on ecological validity. Ten patients undertook an 11-week face training program and an 11-week control task...
March 2017: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/28062719/characteristics-in-limbic-encephalitis-with-anti-adenylate-kinase-5-autoantibodies
#13
Le-Duy Do, Eve Chanson, Virginie Desestret, Bastien Joubert, François Ducray, Sabine Brugière, Yohann Couté, Maité Formaglio, Veronique Rogemond, Catherine Thomas-Antérion, Laura Borrega, Brice Laurens, Francois Tison, Jonathan Curot, Thomas De Brouker, Christine Lebrun-Frenay, Jean-Yves Delattre, Jean-Christophe Antoine, Jerome Honnorat
OBJECTIVE: To report 10 patients with limbic encephalitis (LE) and adenylate kinase 5 autoantibodies (AK5-Abs). METHODS: We conducted a retrospective study in a cohort of 50 patients with LE with uncharacterized autoantibodies and identified a specific target using immunohistochemistry, Western blotting, immunoprecipitation, mass spectrometry, and cell-based assay. RESULTS: AK5 (a known autoantigen of LE) was identified as the target of antibodies in the CSFs and sera of 10 patients with LE (median age 64 years; range 57-80), which was characterized by subacute anterograde amnesia without seizure and sometimes preceded by a prodromal phase of asthenia or mood disturbances...
February 7, 2017: Neurology
https://www.readbyqxmd.com/read/28034340/topographic-processing-in-developmental-prosopagnosia-preserved-perception-but-impaired-memory-of-scenes
#14
Solja K Klargaard, Randi Starrfelt, Anders Petersen, Christian Gerlach
Anecdotal evidence suggests a relation between impaired spatial (navigational) processing and developmental prosopagnosia. To address this formally, we tested two aspects of topographic processing - that is, perception and memory of mountain landscapes shown from different viewpoints. Participants included nine individuals with developmental prosopagnosia and 18 matched controls. The group with developmental prosopagnosia had no difficulty with topographic perception, but was reliably poorer in the retention of topographic information...
October 2016: Cognitive Neuropsychology
https://www.readbyqxmd.com/read/27893239/face-blind-for-other-race-faces-individual-differences-in-other-race-recognition-impairments
#15
Lulu Wan, Kate Crookes, Amy Dawel, Madeleine Pidcock, Ashleigh Hall, Elinor McKone
We report the existence of a previously undescribed group of people, namely individuals who are so poor at recognition of other-race faces that they meet criteria for clinical-level impairment (i.e., they are "face-blind" for other-race faces). Testing 550 participants, and using the well-validated Cambridge Face Memory Test for diagnosing face blindness, results show the rate of other-race face blindness to be nontrivial, specifically 8.1% of Caucasians and Asians raised in majority own-race countries. Results also show risk factors for other-race face blindness to include: a lack of interracial contact; and being at the lower end of the normal range of general face recognition ability (i...
November 28, 2016: Journal of Experimental Psychology. General
https://www.readbyqxmd.com/read/27792780/on-the-relation-between-face-and-object-recognition-in-developmental-prosopagnosia-no-dissociation-but-a-systematic-association
#16
Christian Gerlach, Solja K Klargaard, Randi Starrfelt
There is an ongoing debate about whether face recognition and object recognition constitute separate domains. Clarification of this issue can have important theoretical implications as face recognition is often used as a prime example of domain-specificity in mind and brain. An important source of input to this debate comes from studies of individuals with developmental prosopagnosia, suggesting that face recognition can be selectively impaired. We put the selectivity hypothesis to test by assessing the performance of 10 individuals with developmental prosopagnosia on demanding tests of visual object processing involving both regular and degraded drawings...
2016: PloS One
https://www.readbyqxmd.com/read/27756661/prosopagnosia-induced-by-a-left-anterior-temporal-lobectomy-following-a-right-temporo-occipital-resection-in-a-multicentric-diffuse-low-grade-glioma
#17
Francesco Corrivetti, Guillaume Herbet, Sylvie Moritz-Gasser, Hugues Duffau
BACKGROUND: Face recognition is a complex function sustained by a distributed large-scale neural network, with a core system involving the ventral occipitotemporal cortex, the inferior longitudinal fasciculus (ILF), and the splenial commissural fibers. This circuit seems to be bilaterally organized, but with a right hemispheric dominance. According to this anatomic functional model, prosopagnosia is usually, but not exclusively, generated by a damage of the right part of this brain network...
January 2017: World Neurosurgery
https://www.readbyqxmd.com/read/27693815/congenital-prosopagnosia-is-associated-with-a-genetic-variation-in-the-oxytocin-receptor-oxtr-gene-an-exploratory-study
#18
Zaira Cattaneo, Roberta Daini, Manuela Malaspina, Federico Manai, Mariarita Lillo, Valentina Fermi, Susanna Schiavi, Boris Suchan, Sergio Comincini
Face-recognition deficits, referred to with the term prosopagnosia (i.e., face blindness), may manifest during development in the absence of any brain injury (from here the term congenital prosopagnosia, CP). It has been estimated that approximately 2.5% of the population is affected by face-processing deficits not depending on brain lesions, and varying a lot in severity. The genetic bases of this disorder are not known. In this study we tested for genetic association between single-nucleotide polymorphisms (SNPs) in the oxytocin receptor gene (OXTR) and CP in a restricted cohort of Italian participants...
December 17, 2016: Neuroscience
https://www.readbyqxmd.com/read/27649025/cognitive-world-neuropsychology-of-individual-differences
#19
Alfredo Ardila, Monica Rosselli
It is proposed that depending upon the specific pattern of cognitive abilities, each individual lives in an idiosyncratic "cognitive world." Brain pathology can be associated with some disturbed abilities, and frequently experiential changes (i.e., how the world is understood) are observed. Because these patients often are aware of their intellectual changes, they may represent excellent models to illustrate the diversity of cognitive interpretations an individual can have about the surrounding environmental conditions...
September 20, 2016: Applied Neuropsychology. Adult
https://www.readbyqxmd.com/read/27605606/perception-and-processing-of-faces-in-the-human-brain-is-tuned-to-typical-feature-locations
#20
Benjamin de Haas, D Samuel Schwarzkopf, Ivan Alvarez, Rebecca P Lawson, Linda Henriksson, Nikolaus Kriegeskorte, Geraint Rees
UNLABELLED: Faces are salient social stimuli whose features attract a stereotypical pattern of fixations. The implications of this gaze behavior for perception and brain activity are largely unknown. Here, we characterize and quantify a retinotopic bias implied by typical gaze behavior toward faces, which leads to eyes and mouth appearing most often in the upper and lower visual field, respectively. We found that the adult human visual system is tuned to these contingencies. In two recognition experiments, recognition performance for isolated face parts was better when they were presented at typical, rather than reversed, visual field locations...
September 7, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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