Biasing the Organism for Novelty: A Pervasive Property of the Attention System
Biasing the Organism for Novelty: A Pervasive Property of the Attention System
复制标题
使有机体偏向于新颖性：注意力系统的普遍属性
DOI：
10.1002/hbm.20924
复制
发表时间：
2010-08-01
影响因子：
4.8
通讯作者：
Zhou, Xiaolin
中科院分区：
文献类型：
--
作者：
Chen, Qi;Fuentes, Luis J.;Zhou, Xiaolin
虽然定向和执行注意网络之间的功能和解剖学独立性已经得到很好的建立，但令人惊讶的是，对它们之间潜在的神经相互作用知之甚少。最近的研究指出，空间返回抑制（IOR），与定向网络相关的机制，和非空间返回抑制，与执行网络相关的机制，可能会偏向生物体的新的位置和对象，分别。通过正交组合的空间和非空间IOR范式在这个fMRI研究中，我们证明了定向和执行网络的相互作用和相互补偿偏置的注意系统的新颖性。行为上，只有当目标的颜色是新的，参与者对旧位置的目标反应较慢，只有当目标出现在一个新的空间位置时，参与者对旧颜色表示的反应较慢。在神经方面，只有当执行网络中的非空间IOR机制不起作用时（即，当目标的颜色是新的时）;只有当定向网络中的空间IOR机制不起作用时（即，当目标出现在新的位置时）。^Brain Mapp，2010.© 2010 Wiley利斯公司
Although the functional and anatomical independences between the orienting and the executive attention networks have been well established, surprisingly little is known about the potential neural interaction between them. Recent studies point out that spatial inhibition of return (IOR), a mechanism associated with the orienting network, and nonspatial inhibition of return, a mechanism associated with the executive network, might bias the organism for novel locations and objects, respectively. By orthogonally combining the spatial and the nonspatial IOR paradigms in this fMRI study, we demonstrate that the orienting and the executive networks interact and compensate each other in biasing the attention system for novelty. Behaviorally, participants responded slower to the target at the old location only when the color of the target was novel, and participants responded slower to the old color representation only when the target appeared at a novel spatial location. Neurally, the orienting network was involved in slowing down responses to the old location only when the nonspatial IOR mechanism in the executive network was not operative (i.e., when the color of the target was novel); the prefrontal executive network was involved in slowing down responses to the old color representation only when the spatial IOR mechanism in the orienting network was not functioning (i.e., when the target appeared at a novel location). Hum Brain Mapp, 2010. © 2010 Wiley‐Liss, Inc.