Defining Auditory-Visual Objects: Behavioral Tests and Physiological Mechanisms.
Defining Auditory-Visual Objects: Behavioral Tests and Physiological Mechanisms.
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DOI：
10.1016/j.tins.2015.12.007
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发表时间：
2016-02
影响因子：
15.9
通讯作者：
Lee AKC
中科院分区：
文献类型：
--
作者：
Bizley JK;Maddox RK;Lee AKC
跨模态整合是一个适用于许多现象的术语，其中一种感觉模态影响另一种感觉模态的任务表现或感知。我们将“绑定”一词区分为应该专门保留用于支持感知对象形成的过程的术语。为了明确地区分结合与其他类型的整合，行为和神经研究必须研究与连接听觉和视觉刺激的特征正交的特征的感知。我们认为，支持真正的知觉绑定（与决策等其他过程相反）是早期感觉皮层中跨感觉影响的作用之一。因此，这些早期的多感官相互作用可能形成了将听觉和视觉刺激自下而上分组为听觉视觉（AV）对象的生理基础。跨模态整合和绑定在文献中被视为同义词，感知变化和决策等其他交互之间没有明确的界限。跨模式绑定被认为是一种独特的整合形式，导致多感官对象的形成。多感觉刺激在嘈杂的环境中最有益，但很少有研究利用刺激竞争来研究支撑多感觉整合的过程。有证据表明，视觉和听觉注意力都是基于对象的——对象内的所有特征都会得到增强，并且关注对象之间和对象内的特征是有成本的。可以在整个大脑中观察到多感觉相互作用，包括早期感觉皮层。早期感觉皮层在多感觉整合中的作用尚不清楚，但可能是跨模式结合的基础。
Crossmodal integration is a term applicable to many phenomena in which one sensory modality influences task performance or perception in another sensory modality. We distinguish the term binding as one that should be reserved specifically for the process that underpins perceptual object formation. To unambiguously differentiate binding form other types of integration, behavioral and neural studies must investigate perception of a feature orthogonal to the features that link the auditory and visual stimuli. We argue that supporting true perceptual binding (as opposed to other processes such as decision-making) is one role for cross-sensory influences in early sensory cortex. These early multisensory interactions may therefore form a physiological substrate for the bottom-up grouping of auditory and visual stimuli into auditory-visual (AV) objects. Crossmodal integration and binding have been treated as synonymous in the literature, with no clear delineation between perceptual changes and other interactions such as decision-making. Crossmodal binding is proposed as a distinct form of integration leading to multisensory object formation. Multisensory stimuli are most beneficial in noisy situations, but few studies use stimulus competition to investigate the processes underpinning multisensory integration. Evidence suggests that both visual and auditory attention is object-based – all features within an object are enhanced and there is a cost to attending features across versus within objects. Multisensory interactions can be observed throughout the brain, including early sensory cortex. The role of early sensory cortex in multisensory integration is unknown, but may underlie crossmodal binding.