Correlation detection as a general mechanism for multisensory integration.
Correlation detection as a general mechanism for multisensory integration.
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DOI：
10.1038/ncomms11543
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发表时间：
2016-06-06
影响因子：
16.6
通讯作者：
Ernst MO
中科院分区：
文献类型：
--
作者：
Parise CV;Ernst MO
大脑通过选择性地组合连续的多感官输入流中的相关信号来有效地处理多感官信息。为此，它需要检测感官之间的相关性、滞后性和同步性；优化整合相关信息；并动态适应跨感官的时空冲突。在这里，我们表明，多感官知觉的所有这些方面都可以通过假设一个类似于 Hassenstein-Reichardt 探测器（最初为视觉运动知觉开发的模型）的基本处理单元来共同解释。该单元被称为多感官相关检测器（MCD），通过一组时间滤波器集成相关的多感官信号，然后进行线性组合。我们的模型可以严格复制人类的感知，正如一系列新颖的和之前发表的实证研究所测量的那样。 MCD 提供了统一的多感官处理一般理论，它同时用一个简单但生理上合理的模型解释了广泛的现象。 人脑将多个感官流的输入整合成一个统一的感知。在这里，Parise 和 Ernst 提出了一个模型，用于评估多感官刺激的相关性、滞后性和同步性，并预测多感官时间和空间任务的心理物理表现。
The brain efficiently processes multisensory information by selectively combining related signals across the continuous stream of multisensory inputs. To do so, it needs to detect correlation, lag and synchrony across the senses; optimally integrate related information; and dynamically adapt to spatiotemporal conflicts across the senses. Here we show that all these aspects of multisensory perception can be jointly explained by postulating an elementary processing unit akin to the Hassenstein–Reichardt detector—a model originally developed for visual motion perception. This unit, termed the multisensory correlation detector (MCD), integrates related multisensory signals through a set of temporal filters followed by linear combination. Our model can tightly replicate human perception as measured in a series of empirical studies, both novel and previously published. MCDs provide a unified general theory of multisensory processing, which simultaneously explains a wide spectrum of phenomena with a simple, yet physiologically plausible model. The human brain integrates inputs across multiple sensory streams into a unified percept. Here Parise and Ernst present a model that assesses the correlation, lag and synchrony of multisensory stimuli, and predicts psychophysical performance on multisensory temporal and spatial tasks.