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首页> 外文期刊>The European Journal of Neuroscience >Behavioural evidence for separate mechanisms of audiovisual temporal binding as a function of leading sensory modality
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Behavioural evidence for separate mechanisms of audiovisual temporal binding as a function of leading sensory modality

机译：视听时间绑定的不同机制的行为证据，作为主导的感觉模态的函数

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摘要

The ability to integrate auditory and visual information is critical for effective perception and interaction with the environment, and is thought to be abnormal in some clinical populations. Several studies have investigated the time window over which audiovisual events are integrated, also called the temporal binding window, and revealed asymmetries depending on the order of audiovisual input (i.e. the leading sense). When judging audiovisual simultaneity, the binding window appears narrower and non-malleable for auditory-leading stimulus pairs and wider and trainable for visual-leading pairs. Here we specifically examined the level of independence of binding mechanisms when auditory-before-visual vs. visual-before-auditory input is bound. Three groups of healthy participants practiced audiovisual simultaneity detection with feedback, selectively training on auditory-leading stimulus pairs (group1), visual-leading stimulus pairs (group2) or both (group3). Subsequently, we tested for learning transfer (crossover) from trained stimulus pairs to non-trained pairs with opposite audiovisual input. Our data confirmed the known asymmetry in size and trainability for auditory-visual vs. visual-auditory binding windows. More importantly, practicing one type of audiovisual integration (e.g. auditory-visual) did not affect the other type (e.g. visual-auditory), even if trainable by within-condition practice. Together, these results provide crucial evidence that audiovisual temporal binding for auditory-leading vs. visual-leading stimulus pairs are independent, possibly tapping into different circuits for audiovisual integration due to engagement of different multisensory sampling mechanisms depending on leading sense. Our results have implications for informing the study of multisensory interactions in healthy participants and clinical populations with dysfunctional multisensory integration.
机译：整合听觉和视觉信息的能力对于有效感知和与环境互动至关重要，并且在某些临床人群中被认为是异常的。几项研究调查了整合视听事件的时间窗口（也称为时间绑定窗口），并根据视听输入的顺序（即超前感觉）揭示了不对称性。当判断视听同时性时，对于听觉主导刺激对来说，绑定窗口显得更窄且不容侵犯，而对于视觉主导对刺激则更宽且易于训练。在这里，我们专门检查了听觉前视觉对比听觉前视觉输入绑定时绑定机制的独立性水平。三组健康参与者通过反馈进行视听同时性检测，对听觉主导刺激对（第1组），视觉主导刺激对（第2组）或两者（第3组）进行选择性训练。随后，我们测试了从受过训练的刺激对到具有相反视听输入的未受过训练的对的学习转移（交叉）。我们的数据证实了听觉-视觉与视觉-听觉绑定窗口的大小和可训练性方面的已知不对称性。更重要的是，即使可以通过条件内练习进行训练，练习一种视听整合（例如听觉-视觉）也不会影响另一种类型（例如视听）。在一起，这些结果提供了至关重要的证据，表明听觉引导与视觉引导刺激对的视听时间绑定是独立的，可能会由于依赖于领先感觉而采用不同的多感官采样机制，从而进入视听整合的不同电路。我们的结果对健康参与者和功能异常的多感官整合的临床人群中的多感官互动研究提供了启示。

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