Covert Attention
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. High frequency of silent brain infarcts associated with cognitive deficits in an economically disadvantaged population
OBJECTIVE: Using magnetic resonance imaging, we aimed to assess the presence of silent brain vascular lesions in a sample of apparently healthy elderly individuals who were recruited from an economically disadvantaged urban region (São Paulo, Brazil). We also wished to investigate whether the findings were associated with worse cognitive performance. METH
Clinics. Publicado em: 2017-08
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2. A persuasão na propaganda dirigida a crianças: uma análise sob a perspectiva da gramática sistêmico-funcional
The marketing techniques aimed at children have lead to them desire for the act of buying, creating needs sometimes superfluous. For the modern advertising, it is clear that mass consumption is only possible if the producer expresses a persuasive message under a guise of information (FUERTES-OLIVERA et al., 2001). Advertisers attract potential buyers through
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/11/2012
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3. Orientação encoberta da atenção visual em não-músicos e músicos com estudo formal em música / Covert orienting of visual attention in non-musicians and musicians with formal music training
Atenção refere-se ao conjunto de processos que leva à seleção ou processamento preferencial de informações presentes em determinadas porções da rede nervosa. Existem relatos de que músicos exibem melhor desempenho que não-músicos em tarefas que envolvem atenção dado que a tarefa de leitura à primeira vista (de partituras) ativa múltiplas regi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/04/2011
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4. Inhibition of return, gap effect and saccadic reaction time to a visual target
Simple manual reaction time (MRT) to a visual target (S2) is shortened when a non-informative cue (S1) is flashed at the S2 location shortly before the onset of S2 (early facilitation). Afterwards, MRT to S2 appearing at the S1 location is lengthened (inhibition of return - IOR). Similar results have been obtained for saccadic reaction time (SRT). Moreover,
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-04
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5. Covert attention accelerates the rate of visual information processing
Whenever we open our eyes, we are confronted with an overwhelming amount of visual information. Covert attention allows us to select visual information at a cued location, without eye movements, and to grant such information priority in processing. Covert attention can be voluntarily allocated, to a given location according to goals, or involuntarily al
The National Academy of Sciences.
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6. Microstimulation of the superior colliculus focuses attention without moving the eyes
The superior colliculus (SC) is part of a network of brain areas that directs saccadic eye movements, overtly shifting both gaze and attention from position to position, in space. Here, we seek direct evidence that the SC also contributes to the control of covert spatial attention, a process that focuses attention on a region of space different from the poin
National Academy of Sciences.
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7. Covert orienting attention in Parkinson's disease.
We examined covert orienting attention in twenty patients with Parkinson's disease using Posner's reaction time (RT) method. Patients were divided according to the grade of severity (Hoehn and Yahr), the P1 group was grade I-II and P2 group grade II-IV. Each group of patients was compared with an equal number of age-matched controls. In controls, and in the
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8. Frontoparietal cortical networks for directing attention and the eye to visual locations: Identical, independent, or overlapping neural systems?
Functional anatomical and single-unit recording studies indicate that a set of neural signals in parietal and frontal cortex mediates the covert allocation of attention to visual locations, as originally proposed by psychological studies. This frontoparietal network is the source of a location bias that interacts with extrastriate regions of the ventral
The National Academy of Sciences.
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9. Deficits in human visual spatial attention following thalamic lesions.
There has been speculation concerning the role that thalamic nuclei play in directing attention to locations in visual space [Crick, F. (1984) Proc. Natl. Acad. Sci. USA 81, 4586-4590]. We measured covert shifts of visual attention in three patients with unilateral thalamic hemorrhages shortly after the lesion and after a 6-month recovery period. The experim
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10. On the Origin of Event-Related Potentials Indexing Covert Attentional Selection During Visual Search
Despite nearly a century of electrophysiological studies recording extracranially from humans and intracranially from monkeys, the neural generators of nearly all human event-related potentials (ERPs) have not been definitively localized. We recorded an attention-related ERP component, known as the N2pc, simultaneously with intracranial spikes and local fiel
American Physiological Society.
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11. Neural Control of Visual Search by Frontal Eye Field: Effects of Unexpected Target Displacement on Visual Selection and Saccade Preparation
The dynamics of visual selection and saccade preparation by the frontal eye field was investigated in macaque monkeys performing a search-step task combining the classic double-step saccade task with visual search. Reward was earned for producing a saccade to a color singleton. On random trials the target and one distractor swapped locations before the sacca
American Physiological Society.