Cross-modal processing in early visual and auditory cortices depends on expected statistical relationship of multisensory information
Cross-modal processing in early visual and auditory cortices depends on expected statistical relationship of multisensory information
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DOI：
10.1523/jneurosci.1457-06.2006
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发表时间：
2006-11-22
影响因子：
5.3
通讯作者：
Mueller, Notger G.
中科院分区：
文献类型：
--
作者：
Baier, Bernhard;Kleinschmidt, Andreas;Mueller, Notger G.
以往的研究表明，在一个感官形式的处理信息可以增强或衰减的同时刺激另一种形式。在这里，我们调和这些明显矛盾的结果表明，跨模态相互作用的迹象取决于两种模态的内容是否相关联或不。当同时呈现的听觉和视觉刺激是配对的机会，线索诱导的预备神经活动强烈增强的任务相关的感觉系统和抑制无关的系统。相反，当两种模态中的信息可靠地关联时，无论哪种模态与任务相关，两个系统中的活动都得到增强。我们的研究结果说明了一个生态最佳的灵活性的神经机制，管理多感官处理：促进时发生的整合是预期的，和抑制时发生的分心是预期的。由于丘脑结构更活跃时，需要单独操作的感觉，我们建议他们在早期的跨通道的相互作用的看门人的功能。
Previous studies have shown that processing information in one sensory modality can either be enhanced or attenuated by concurrent stimulation of another modality. Here, we reconcile these apparently contradictory results by showing that the sign of cross-modal interactions depends on whether the content of two modalities is associated or not. When concurrently presented auditory and visual stimuli are paired by chance, cue-induced preparatory neural activity is strongly enhanced in the task-relevant sensory system and suppressed in the irrelevant system. Conversely, when information in the two modalities is reliably associated, activity is enhanced in both systems regardless of which modality is task relevant. Our findings illustrate an ecologically optimal flexibility of the neural mechanisms that govern multisensory processing: facilitation occurs when integration is expected, and suppression occurs when distraction is expected. Because thalamic structures were more active when the senses needed to operate separately, we propose them to serve gatekeeper functions in early cross-modal interactions.