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Prosopagnosia

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https://www.readbyqxmd.com/read/29327279/emotion-recognition-and-psychological-comorbidity-in-friedreich-s-ataxia
#1
Teresa Costabile, Veronica Capretti, Filomena Abate, Agnese Liguori, Francesca Paciello, Chiara Pane, Anna De Rosa, Silvio Peluso, Giuseppe De Michele, Alessandro Filla, Francesco Saccà
Friedreich's ataxia (FRDA) is an autosomal recessive disease presenting with ataxia, corticospinal signs, peripheral neuropathy, and cardiac abnormalities. Little effort has been made to understand the psychological and emotional burden of the disease. The aim of our study was to measure patients' ability to recognize emotions using visual and non-verbal auditory hints, and to correlate this ability with psychological, neuropsychological, and neurological variables. We included 20 patients with FRDA, and 20 age, sex, and education matched healthy controls (HC)...
January 11, 2018: Cerebellum
https://www.readbyqxmd.com/read/29320938/diagnosing-prosopagnosia-the-utility-of-visual-noise-in-the-cambridge-face-recognition-test
#2
Sherysse L Corrow, Andrea Albonico, Jason J S Barton
Adding visual noise to facial images has been used to increase reliance on configural processing. Whether this enhances the ability of tests to diagnose prosopagnosia is not known. We examined 15 subjects with developmental prosopagnosia, 13 subjects with acquired prosopagnosia, and 38 control subjects with the Cambridge Face Memory Test. We compared their performance on the second phase, without visual noise, and on the third phase, which adds visual noise. We analyzed the results with signal detection theory methods...
January 1, 2018: Perception
https://www.readbyqxmd.com/read/29288013/impaired-perception-of-facial-emotion-in-developmental-prosopagnosia-a-reply-to-van-den-stock-s-commentary
#3
Federica Biotti, Richard Cook
No abstract text is available yet for this article.
December 2, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29261708/delayed-processing-of-global-shape-information-in-developmental-prosopagnosia
#4
Christian Gerlach, Solja K Klargaard, Anders Petersen, Randi Starrfelt
There is accumulating evidence suggesting that a central deficit in developmental prosopagnosia (DP), a disorder characterized by profound and lifelong difficulties with face recognition, concerns impaired holistic processing. Some of this evidence comes from studies using Navon's paradigm where individuals with DP show a greater local or reduced global bias compared with controls. However, it has not been established what gives rise to this altered processing bias. Is it a reduced global precedence effect, changes in susceptibility to interference effects or both? By analyzing the performance of 10 individuals with DP in Navon's paradigm we find evidence of a reduced global precedence effect: The DPs are slower than controls to process global but not local shape information...
2017: PloS One
https://www.readbyqxmd.com/read/29242103/the-neural-network-for-face-recognition-insights-from-an-fmri-study-on-developmental-prosopagnosia
#5
Yuanfang Zhao, Zonglei Zhen, Xiqin Liu, Yiying Song, Jia Liu
Face recognition is supported by collaborative work of multiple face-responsive regions in the brain. Based on findings from individuals with normal face recognition ability, a neural model has been proposed with the occipital face area (OFA), fusiform face area (FFA), and face-selective posterior superior temporal sulcus (pSTS) as the core face network (CFN) and the rest of the face-responsive regions as the extended face network (EFN). However, little is known about how these regions work collaboratively for face recognition in our daily life...
December 11, 2017: NeuroImage
https://www.readbyqxmd.com/read/29228849/using-prosopagnosia-to-test-and-modify-visual-recognition-theory
#6
Alexander M O'Brien
Biederman's contemporary theory of basic visual object recognition (Recognition-by-Components) is based on structural descriptions of objects and presumes 36 visual primitives (geons) people can discriminate, but there has been no empirical test of the actual use of these 36 geons to visually distinguish objects. In this study, we tested for the actual use of these geons in basic visual discrimination by comparing object discrimination performance patterns (when distinguishing varied stimuli) of an acquired prosopagnosia patient (LB) and healthy control participants...
January 1, 2017: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/29206082/developmental-prosopagnosia-with-concurrent-topographical-difficulties-a-case-report-and-virtual-reality-training-programme
#7
Sarah Bate, Amanda Adams, Rachel Bennetts, Hannah Line
Several neuropsychological case studies report brain-damaged individuals with concurrent impairments in face recognition (i.e., prosopagnosia) and topographical orientation. Recently, individuals with a developmental form of topographical disorientation have also been described, and several case reports of individuals with developmental prosopagnosia provide anecdotal evidence of concurrent navigational difficulties. Clearly, the co-occurrence of these difficulties can exacerbate the negative psychosocial consequences associated with each condition...
December 5, 2017: Neuropsychological Rehabilitation
https://www.readbyqxmd.com/read/29200563/problems-of-face-recognition-in-patients-with-behavioral-variant-frontotemporal-dementia
#8
Sadanandavalli Retnaswami Chandra, Ketaki Patwardhan, Anupama Ramakanth Pai
Introduction: Faces are very special as they are most essential for social cognition in humans. It is partly understood that face processing in its abstractness involves several extra striate areas. One of the most important causes for caregiver suffering in patients with anterior dementia is lack of empathy. This apart from being a behavioral disorder could be also due to failure to categorize the emotions of the people around them. Patients and Methods: Inlusion criteria: DSM IV for Bv FTD Tested for prosopagnosia - familiar faces, famous face, smiling face, crying face and reflected face using a simple picture card (figure 1)...
September 2017: Indian Journal of Psychological Medicine
https://www.readbyqxmd.com/read/29192795/evidence-of-taxonomy-for-developmental-topographical-disorientation-developmental-landmark-agnosia-case-1
#9
L Piccardi, M De Luca, A Di Vita, L Palermo, A Tanzilli, C Dacquino, M R Pizzamiglio
We report Developmental Landmark Agnosia (DLA) in a 6-year-old boy (L.G.) who was referred to us for congenital prosopagnosia (see Pizzamiglio et al., 2017 , in which both testing and rehabilitation of Congenital Prosopagnosia are reported). We investigated his performance using a neuropsychological battery and eye movement recordings. The assessment showed the presence of deficits in recognizing familiar places (along with Congenital Prosopagnosia), but not common objects. Eye movement recordings confirmed his problems in recognizing familiar landmarks and misrecognition of unfamiliar places...
December 1, 2017: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/29165034/congenital-prosopagnosia-without-object-agnosia-a-literature-review
#10
Jacob Geskin, Marlene Behrmann
A longstanding controversy concerns the functional organization of high-level vision, and the extent to which the recognition of different classes of visual stimuli engages a single system or multiple independent systems. We examine this in the context of congenital prosopagnosia (CP), a neurodevelopmental disorder in which individuals, without a history of brain damage, are impaired at face recognition. This paper reviews all CP cases from 1976 to 2016, and explores the evidence for the association or dissociation of face and object recognition...
November 22, 2017: Cognitive Neuropsychology
https://www.readbyqxmd.com/read/28945627/the-visual-agnosias-and-related-disorders
#11
Sameen Haque, Michael S Vaphiades, Christian J Lueck
BACKGROUND: There are many disorders of higher visual processing that result from damage to specific areas of the cerebral cortex that have a specific role in processing certain aspects (modalities) of vision. These can be grouped into those that affect the ventral, or "what?", pathway (e.g., object agnosia, cerebral achromatopsia, prosopagnosia, topographagnosia, and pure alexia), and those that affect the dorsal, or "where?", pathway (e.g., akinetopsia, simultanagnosia, and optic ataxia)...
September 22, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28932205/face-and-word-recognition-can-be-selectively-affected-by-brain-injury-or-developmental-disorders
#12
REVIEW
Ro J Robotham, Randi Starrfelt
Face and word recognition have traditionally been thought to rely on highly specialised and relatively independent cognitive processes. Some of the strongest evidence for this has come from patients with seemingly category-specific visual perceptual deficits such as pure prosopagnosia, a selective face recognition deficit, and pure alexia, a selective word recognition deficit. Together, the patterns of impaired reading with preserved face recognition and impaired face recognition with preserved reading constitute a double dissociation...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28906173/diagnosing-prosopagnosia-in-east-asian-individuals-norms-for-the-cambridge-face-memory-test-chinese
#13
Elinor McKone, Lulu Wan, Rachel Robbins, Kate Crookes, Jia Liu
The Cambridge Face Memory Test (CFMT) is widely accepted as providing a valid and reliable tool in diagnosing prosopagnosia (inability to recognize people's faces). Previously, large-sample norms have been available only for Caucasian-face versions, suitable for diagnosis in Caucasian observers. These are invalid for observers of different races due to potentially severe other-race effects. Here, we provide large-sample norms (N = 306) for East Asian observers on an Asian-face version (CFMT-Chinese). We also demonstrate methodological suitability of the CFMT-Chinese for prosopagnosia diagnosis (high internal reliability, approximately normal distribution, norm-score range sufficiently far above chance)...
September 14, 2017: Cognitive Neuropsychology
https://www.readbyqxmd.com/read/28888893/face-working-memory-deficits-in-developmental-prosopagnosia-tests-of-encoding-limits-and-updating-processes
#14
Margaret C Jackson, Paul Counter, Jeremy J Tree
Developmental prosopagnosia (DP) is a condition in which individuals experience life-long problems recognising faces. In recent years, unpacking the nature of the impairments of this population has been the focus of numerous studies. One focus has been on the nature of face-based memory impairments for such individuals, with the onus being mainly on long-term memory deficits. Far fewer have considered the nature of face-based working memory (WM) impairments for DP cases, and the current study seeks to address this...
September 6, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28843416/visual-agnosia-and-focal-brain-injury
#15
REVIEW
O Martinaud
Visual agnosia encompasses all disorders of visual recognition within a selective visual modality not due to an impairment of elementary visual processing or other cognitive deficit. Based on a sequential dichotomy between the perceptual and memory systems, two different categories of visual object agnosia are usually considered: 'apperceptive agnosia' and 'associative agnosia'. Impaired visual recognition within a single category of stimuli is also reported in: (i) visual object agnosia of the ventral pathway, such as prosopagnosia (for faces), pure alexia (for words), or topographagnosia (for landmarks); (ii) visual spatial agnosia of the dorsal pathway, such as cerebral akinetopsia (for movement), or orientation agnosia (for the placement of objects in space)...
August 23, 2017: Revue Neurologique
https://www.readbyqxmd.com/read/28825896/altered-topology-of-neural-circuits-in-congenital-prosopagnosia
#16
Gideon Rosenthal, Michal Tanzer, Erez Simony, Uri Hasson, Marlene Behrmann, Galia Avidan
Using a novel, fMRI-based inter-subject functional correlation (ISFC) approach, which isolates stimulus-locked inter-regional correlation patterns, we compared the cortical topology of the neural circuit for face processing in participants with an impairment in face recognition, congenital prosopagnosia (CP), and matched controls. Whereas the anterior temporal lobe served as the major network hub for face processing in controls, this was not the case for the CPs. Instead, this group evinced hyper-connectivity in posterior regions of the visual cortex, mostly associated with the lateral occipital and the inferior temporal cortices...
August 21, 2017: ELife
https://www.readbyqxmd.com/read/28774225/the-anterior-temporal-lobes-new-frontiers-opened-to-neuropsychological-research-by-changes-in-health-care-and-disease-epidemiology
#17
Guido Gainotti
Changes in health care and disease epidemiology have shifted the attention of neuropsychologists and cognitive neuroscientists from vascular lesions to degenerative diseases or other bilateral brain lesions. This displacement of attention from vascular patients to patients with degenerative brain diseases allowed the discovery of hitherto unexplored and unheralded aspects of the neural substrates of human cognition. Three aspects of research on the anterior parts of the temporal lobes (ATLs) are the focus of the present review...
August 4, 2017: Journal of Neuropsychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28764909/a-novel-psen1-s230n-mutation-causing-early-onset-alzheimer-s-disease-associated-with-prosopagnosia-hoarding-and-parkinsonism
#18
John M Ringman, Maria Casado, Victoria Van Berlo, Judy Pa, Nelly Joseph-Mathurin, Anne M Fagan, Tammie Benzinger, Randall J Bateman, John C Morris
We describe clinical and biomarker findings in an index patient with the onset of Alzheimer's disease (AD) symptoms at age 57 and a family history consistent with an autosomal dominant pattern of inheritance. She had the atypical early features of visual agnosia and prosopagnosia followed by hoarding behavior and Parkinsonism. Structural MRI revealed global atrophy that was most severe in the lateral temporal lobes and insular cortex bilaterally. CSF biomarker assessment showed Aβ42, p-tau181, and total tau levels consistent with AD...
September 14, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28697903/implicit-self-other-discrimination-affects-the-interplay-between-multisensory-affordances-of-mental-representations-of-faces
#19
David Zeugin, Norhan Arfa, Michael Notter, Micah M Murray, Silvio Ionta
Face recognition is an apparently straightforward but, in fact, complex ability, encompassing the activation of at least visual and somatosensory representations. Understanding how identity shapes the interplay between these face-related affordances could clarify the mechanisms of self-other discrimination. To this aim, we exploited the so-called "face inversion effect" (FIE), a specific bias in the mental rotation of face images (of other people): with respect to inanimate objects, face images require longer time to be mentally rotated from the upside-down...
July 8, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28648569/impaired-processing-of-facial-happiness-with-or-without-awareness-in-developmental-prosopagnosia
#20
Edwin J Burns, Joel Martin, Alice H D Chan, Hong Xu
Developmental prosopagnosia (DP) is associated with severe, lifelong deficits in face recognition, with such cases often cited as support for a dissociation between the processing of facial identity and emotion. Here we examine the evidence against this dissociation and propose that the processing of facial happiness, either with or without awareness, is actually integrated within the same neural network involved in facial identity recognition. We also test this hypothesis on a group of DP cases and neurotypical controls (NT) by adapting them to expressionless neutral faces, intact happy faces and hybrid faces...
July 28, 2017: Neuropsychologia
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