期刊
COGNITIVE BRAIN RESEARCH
卷 23, 期 2-3, 页码 406-417出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cogbrainres.2004.11.003
关键词
attention; ERPs; multimodal; vision; touch
资金
- Wellcome Trust [072524] Funding Source: Medline
Recent evidence indicates that the spatial direction of endogenous covert spatial attention in one sensory modality can crossmodally influence early processing of stimuli in a different modality. However, spatial locations are initially coded according to different frames of reference for different modalities (e.g., body-centered for touch versus retinocentric vision) and postural changes (e.g., gaze shifts) will realign these. Here, we used event-related potentials (ERPs) to investigate how the direction of endogenous tactile attention affects sensory-specific visual ERP components. Critically, by manipulating direction of gaze, we were able to test whether any crossmodal effects depend on visual and tactile projections to a common hemisphere, on common locations in external space, or on some combination of the two. We found that both P 1 and N1 visual components were modulated according to the direction of endogenous tactile attention. While the P 1 crossmodal effect followed purely hemispheric constraints, the attentional modulation of N1 appeared to combine both anatomical and external spatial constraints. (c) 2004 Elsevier B.V. All rights reserved.
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