Multisensory versus unisensory integration: Contrasting modes in the superior colliculus
Multisensory versus unisensory integration: Contrasting modes in the superior colliculus
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DOI：
10.1152/jn.00018.2007
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发表时间：
2007-05-01
影响因子：
2.5
通讯作者：
Stein, Barry E.
中科院分区：
文献类型：
--
作者：
Alvarado, Juan Carlos;Vaughan, J. William;Stein, Barry E.
本研究表明，用于整合来自不同感觉的信息的神经计算与用于整合来自相同感觉的信息的神经计算是不同的。以上丘神经元为模型，研究发现，跨模式刺激组合的多感觉整合产生的反应明显大于最佳成分刺激引起的反应。相比之下，单感觉整合的通道内刺激对产生的反应与最好的成分刺激所引起的反应相似或更少。这种差异体现在多感觉整合过程中超加性反应的不成比例表征和单一感觉整合过程中次加性反应的优势。这些观察表明，不同的规则已经演变为整合感觉信息，一种(单一感觉)反映个体感觉的固有特征，另一种(多感觉)独特的超通道特征，旨在增强启动事件的突显。
The present study suggests that the neural computations used to integrate information from different senses are distinct from those used to integrate information from within the same sense. Using superior colliculus neurons as a model, it was found that multisensory integration of cross-modal stimulus combinations yielded responses that were significantly greater than those evoked by the best component stimulus. In contrast, unisensory integration of within-modal stimulus pairs yielded responses that were similar to or less than those evoked by the best component stimulus. This difference is exemplified by the disproportionate representations of superadditive responses during multisensory integration and the predominance of subadditive responses during unisensory integration. These observations suggest that different rules have evolved for integrating sensory information, one (unisensory) reflecting the inherent characteristics of the individual sense and, the other (multisensory), unique supramodal characteristics designed to enhance the salience of the initiating event.