Mechanisms of selective attention are vital for guiding human behavior. The parietal cortex has long been recognized as a neural substrate of spatial attention, but the unique role of distinct parietal subregions has remained unclear. Using single-pulse transcranial magnetic stimulation, we found that the angular gyrus of the right parietal cortex mediates spatial orienting during two distinct time periods after the onset of a behaviorally relevant event. The biphasic involvement of the angular gyrus suggests that both fast and slow visual pathways are necessary for orienting spatial attention.
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Attention, Brain Mapping, Cues, Electric Stimulation, Functional Laterality, Humans, Magnetics, Nerve Net, Neuropsychological Tests, Orientation, Parietal Lobe, Perceptual Disorders, Photic Stimulation, Psychomotor Performance, Reaction Time, Space Perception, Visual Fields, Visual Pathways