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首页> 外文期刊>The European Journal of Neuroscience >Processing of multisensory spatial congruency can be dissociated from working memory and visuo-spatial attention
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Processing of multisensory spatial congruency can be dissociated from working memory and visuo-spatial attention

机译:多感觉空间一致性的处理可以与工作记忆和视觉空间注意力分离

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摘要

Tactile stimuli at the same location as a visual target can increase activity in the contralateral occipital cortex compared with spatially incongruent bimodal stimulation. Does this cross-modal congruency effect in the visual cortex depend on available cognitive resources? Visual attention and working memory can modulate responses to visual stimuli in the occipital cortex, with attenuation in conditions of high-attentional or low-memory load. Here, we asked if these two cognitive factors affect multisensory processing in the visual cortex. Using functional magnetic resonance imaging in humans, we manipulated the load of working memory or visuo-spatial attention. Concurrently with these primary tasks we presented same-side (congruent) or opposite-side (incongruent) visuo-tactile stimuli. Both experiments revealed enhancement of brain activity for congruent vs incongruent bimodal stimulation in the contralateral occipital cortex. Critically, these cross-modal effects occurred irrespective of the level of load. We conclude that processing of visuo-tactile spatial congruency in the visual cortex does not depend on available visuo-spatial and memory resources.
机译:与空间上不一致的双峰刺激相比,与视觉目标在同一位置的触觉刺激可以增加对侧枕叶皮质的活动。视觉皮层中的这种跨模态一致性效果是否取决于可用的认知资源?视觉注意力和工作记忆可以调节枕叶皮质对视觉刺激的反应,在高注意力或低记忆负荷的情况下会减弱。在这里,我们问这两个认知因素是否影响视觉皮层的多感觉处理。在人类中使用功能磁共振成像,我们操纵了工作记忆或视觉空间注意的负荷。在完成这些主要任务的同时,我们提出了同侧(一致)或反侧(不一致)视觉触觉刺激。这两个实验都揭示了对侧枕叶皮层全等与不全双峰刺激的大脑活动增强。至关重要的是,这些交叉模式效应的发生与负载水平无关。我们得出结论,视觉皮层中的视觉-触觉空间一致性的处理不依赖于可用的视觉-空间和内存资源。

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