A model of active visual search with object-based attention guiding scan paths
Neural Networks - 2004 Special issue Vision and brain
Asynchronies in the Development of Electrophysiological Responses to Motion and Color
Journal of Cognitive Neuroscience
Cue Validity and Object-Based Attention
Journal of Cognitive Neuroscience
Form-From-Motion: MEG Evidence for Time Course and Processing Sequence
Journal of Cognitive Neuroscience
Neural Substrates of Perceptual Enhancement by Cross-Modal Spatial Attention
Journal of Cognitive Neuroscience
Split-Second Sequential Selective Activation in Human Secondary Visual Cortex
Journal of Cognitive Neuroscience
Phonological Processing in Visual Rhyming: A Developmental ERP Study
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Intermodal auditory, visual, and tactile attention modulates early stages of neural processing
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
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The effects of spatial selective attention on sensory processing in visual cortical areas were investigated by means of visual evoked potential (VEP) recordings and source localization techniques. Patterned stimuli were rapidly presented in random order to the left and right visual fields while subjects maintained central fixation and attended to one visual field at a time. Attended stimuli evoked enhanced P1 (100--130 msec) and N1 (120--200 msec) components of the VEP, whereas no effects of attention were observed on the C1 (50--100 msec) or P2 (200--240 msec) components. Spatiotemporal dipole modeling of the early VEP sources was carried out in relation to MRI-defined cortical anatomy. The dipolar generator of the C1 component was found to lie in calcarine cortex, the human homologue of area V1, whereas the attention-sensitive P1 generator was localized to ventral-lateral occipital cortex, within extrastriate area 19. These results support the hypothesis that spatial attention does not affect the initial activity evoked in area V1 but rather produces an enhancement within extrastriate visual areas of sensory signals arising from stimuli at attended locations.