来自反思注意的活动对类别选择性外纹状皮层自上而下的增强和抑制。
Top-down enhancement and suppression of activity in category-selective extrastriate cortex from an act of reflective attention.
机构信息
Department of Psychology, Yale University, New Haven, CT 06520-8205, USA.
出版信息
J Cogn Neurosci. 2009 Dec;21(12):2320-7. doi: 10.1162/jocn.2008.21183.
Abstract
Recent research has demonstrated top-down attentional modulation of activity in extrastriate category-selective visual areas while stimuli are in view (perceptual attention) and after they are removed from view (reflective attention). Perceptual attention is capable of both enhancing and suppressing activity in category-selective areas relative to a passive viewing baseline. In this study, we demonstrate that a brief, simple act of reflective attention ("refreshing") is also capable of both enhancing and suppressing activity in some scene-selective areas (the parahippocampal place area [PPA]) but not others (refreshing resulted in enhancement but not in suppression in the middle occipital gyrus [MOG]). This suggests that different category-selective extrastriate areas preferring the same class of stimuli may contribute differentially to reflective processing of one's internal representations of such stimuli.
摘要
最近的研究表明，在刺激可见时（知觉注意）和刺激从视野中移除后（反射注意），自上而下的注意力可以调节外纹状体类别选择性视觉区域的活动。与被动观察基线相比，知觉注意力既能增强也能抑制类别选择性区域的活动。在这项研究中，我们证明了一个简短而简单的反射注意行为（“刷新”）也能够增强和抑制某些场景选择性区域（旁海马位置区域 [PPA]）的活动，但不能增强或抑制其他区域（在中枕叶回 [MOG] 中，刷新导致增强而不是抑制）。这表明，对相同类别的刺激有偏好的不同类别选择性外纹状体区域可能会对这些刺激的内部表示的反射性处理做出不同的贡献。
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