AFNI: software for analysis and visualization of functional magnetic resonance neuroimages
Computers and Biomedical Research
Cue Validity and Object-Based Attention
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Attention-spreading based on hierarchical spatial representations for connected objects
Journal of Cognitive Neuroscience
Early top-down control of visual processing predicts working memory performance
Journal of Cognitive Neuroscience
Visual processing of contour patterns under conditions of inattentional blindness
Journal of Cognitive Neuroscience
Differential sensitivity of letters, numbers, and symbols to character transpositions
Journal of Cognitive Neuroscience
Normal aging delays and compromises early multifocal visual attention during object tracking
Journal of Cognitive Neuroscience
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Selective attention may be focused upon a region of interest within the visual surroundings, thereby improving the perceptual quality of stimuli at that location. It has been debated whether this spatially selective mechanism plays a role in the attentive selection of whole objects in a visual scene. The relationship between spatial and object-selective attention was investigated here through recordings of event-related brain potentials (ERPs) supplemented with functional magnetic brain imaging (fMRI). Subjects viewed a display consisting of two bar-shaped objects and directed attention to sequences of stimuli (brief corner offsets) at one end of one of the bars. Unattended stimuli belonging to the same object as the attended stimuli elicited spatiotemporal patterns of neural activity in the visual cortex closely resembling those elicited by the attended stimuli themselves, albeit smaller in amplitude. This enhanced neural activity associated with object-selective attention was localized by use of ERP dipole modeling and fMRI to the lateral occipital extrastriate cortex. We conclude that object-selective attention shares a common neural mechanism with spatial attention that entails the facilitation of sensory processing of stimuli within the boundaries of an attended object.