Shuwairi Sarah M, Curtis Clayton E, Johnson Scott P
New York University, NY 10003, USA.
J Cogn Neurosci. 2007 Aug;19(8):1275-85. doi: 10.1162/jocn.2007.19.8.1275.
In everyday environments, objects frequently go out of sight as they move and our view of them becomes obstructed by nearer objects, yet we perceive these objects as continuous and enduring entities. Here, we used functional magnetic resonance imaging with an attentive tracking paradigm to clarify the nature of perceptual and cognitive mechanisms subserving this ability to fill in the gaps in perception of dynamic object occlusion. Imaging data revealed distinct regions of cortex showing increased activity during periods of occlusion relative to full visibility. These regions may support active maintenance of a representation of the target's spatiotemporal properties ensuring that the object is perceived as a persisting entity when occluded. Our findings may shed light on the neural substrates involved in object tracking that give rise to the phenomenon of object permanence.
在日常环境中，物体移动时常常会消失在视野之外，我们对它们的视线会被更近的物体遮挡，但我们仍将这些物体视为连续且持久的实体。在此，我们采用功能磁共振成像和注意力追踪范式，以阐明支撑这种填补动态物体遮挡感知间隙能力的感知和认知机制的本质。成像数据显示，与完全可见期相比，在遮挡期皮质的不同区域活动增强。这些区域可能支持对目标时空属性表征的主动维持，以确保物体在被遮挡时仍被视为一个持续存在的实体。我们的研究结果可能会揭示与物体追踪相关的神经基础，正是这些神经基础导致了物体恒存现象的产生。
