Abnormal Center–Periphery Gradient in Spatial Attention in Simultanagnosia
نویسندگان
چکیده
منابع مشابه
Abnormal Center-Periphery Gradient in Spatial Attention in Simultanagnosia
Patients suffering from simultanagnosia cannot perceive more than one object at a time. The underlying mechanism is incompletely understood. One hypothesis is that simultanagnosia reflects "tunnel vision," a constricted attention window around gaze, which precludes the grouping of individual objects. Although this idea has a long history in neuropsychology, the question whether the patients ind...
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Simultanagnosia is a disorder of visual attention that leaves a patient's world unglued: scenes and objects are perceived in a piecemeal manner. It is generally agreed that simultanagnosia is related to an impairment of attention, but it is unclear whether this impairment is object- or space-based in nature. We first consider the findings that support a concept of simultanagnosia as deficit of ...
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Enhanced perception of detail has long been regarded a hallmark of autism spectrum conditions (ASC), but its origins are unknown. Normal sensitivity on all fundamental perceptual measures-visual acuity, contrast discrimination, and flicker detection-is strongly established in the literature. If individuals with ASC do not have superior low-level vision, how is perception of detail enhanced? We ...
متن کاملThe Neural Underpinings of Simultanagnosia: Disconnecting the Visuospatial Attention Network
Because of our limited processing capacity, different elements of the visual scene compete for the allocation of processing resources. One of the most striking deficits in visual selection is simultanagnosia, a rare neuropsychological condition characterized by impaired spatial awareness of more than one object at time. To decompose the neuroanatomical substrates of the syndrome and to gain ins...
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ژورنال
عنوان ژورنال: Journal of Cognitive Neuroscience
سال: 2014
ISSN: 0898-929X,1530-8898
DOI: 10.1162/jocn_a_00666